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MAEDA Kiminori
| Material Science Division | Associate Professor |
| Chemistry |
Researcher information
■ Degree■ Research Keyword
■ Field Of Study
- Life sciences, Biophysics
- Nanotechnology/Materials, Basic physical chemistry
- Natural sciences, Bio-, chemical, and soft-matter physics
- Apr. 2014 - Present, Saitama University, Graduate School of Science and Engineering, Associate Professor, Japan
- 2008 - Mar. 2014, University of Oxford
- 2005 - 2007, University of Oxford
- 2007
- 2000 - 2005, University of Tsukuba, Department of Chemistry, Lectuler
- 1995 - 2000, Tohoku University, Graduate School of Science
- 1990 - 1995, Tohoku University, Faculty of Science
- 1988, Tohoku University, Faculty of Science, Japan
- 1988, Tohoku University, Faculty of Science, Chemistry
Performance information
■ Paper- Effect of frequency chirp on RYDMR spectrum in AWG-RYDMR system at low magnetic field
Akihiro Tateno; Hiroki Nagashima; Kiminori Maeda
CHEMICAL PHYSICS LETTERS, Volume：864, First page：141905, Last page：141905, Apr. 2025, [Reviewed], [Last, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cplett.2025.141905
DOI ID：10.1016/j.cplett.2025.141905, ISSN：0009-2614, eISSN：1873-4448, Web of Science ID：WOS:001419580600001 - Introduction of magneto-fluorescence fluctuation microspectroscopy for investigating quantum effects in biology
Lewis M. Antill; Mizuki Kohmura; Chiho Jimbo; Kiminori Maeda
NATURE PHOTONICS, Volume：19, Number：2, First page：178, Last page：186, Feb. 2025, [Reviewed], [Last]
English, Scientific journal
DOI：https://doi.org/10.1038/s41566-024-01593-x
DOI ID：10.1038/s41566-024-01593-x, ISSN：1749-4885, eISSN：1749-4893, Web of Science ID：WOS:001394090100001 - Anisotropic and Coherent Control of Radical Pairs by Optimized RF Fields
Akihiro Tateno; Kenta Masuzawa; Hiroki Nagashima; Kiminori Maeda
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, Volume：24, Number：11, Jun. 2023, [Reviewed], [Last, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.3390/ijms24119700
DOI ID：10.3390/ijms24119700, ISSN：1661-6596, eISSN：1422-0067, Web of Science ID：WOS:001004778200001 - Low magnetic field effects on a photoinduced electron transfer reaction in an ionic liquid
Nanshi Harada; Taisuke Matsuo; Tomoaki Yago; Kiminori Maeda; Masanobu Wakasa
CHEMICAL PHYSICS LETTERS, Volume：773, First page：138569, Last page：138569, Jun. 2021, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cplett.2021.138569
DOI ID：10.1016/j.cplett.2021.138569, ISSN：0009-2614, eISSN：1873-4448, ORCID：106571386, Web of Science ID：WOS:000647692200013 - Quantum control of radical pair reactions by local optimization theory
Kenta Masuzawa; Masaya Sato; Michihiko Sugawara; Kiminori Maeda
JOURNAL OF CHEMICAL PHYSICS, Volume：152, Number：1, Jan. 2020, [Reviewed], [Last, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1063/1.5131557
DOI ID：10.1063/1.5131557, ISSN：0021-9606, eISSN：1089-7690, Web of Science ID：WOS:000505578700008 - Dynamics of flavin containing radical pairs in SDS micellar media probed by static and pulse magnetic field effect and pulse ADMR
Kiminori Maeda; Yusuke Naito
MOLECULAR PHYSICS, Volume：117, Number：19, First page：2709, Last page：2718, Oct. 2019, [Reviewed], [Lead, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1080/00268976.2019.1580779
DOI ID：10.1080/00268976.2019.1580779, ISSN：0026-8976, eISSN：1362-3028, Web of Science ID：WOS:000483800200011 - Single-molecule spectroscopy of radical pairs, a theoretical treatment and experimental considerations
Noboru Ikeya; Egor A. Nasibulov; Konstantin L. Ivanov; Kiminori Maeda; Jonathan R. Woodward
MOLECULAR PHYSICS, Volume：117, Number：19, First page：2604, Last page：2617, Oct. 2019, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1080/00268976.2018.1559954
DOI ID：10.1080/00268976.2018.1559954, ISSN：0026-8976, eISSN：1362-3028, Web of Science ID：WOS:000483800200003 - Gigantic Magnetic Field Effect on the Long-Lived Intermolecular Charge-Separated State Created at the Nonionic Bilayer Membrane
Tomoaki Miura; Kiminori Maeda; Yoshimi Oka; Tadaaki Ikoma
JOURNAL OF PHYSICAL CHEMISTRY B, Volume：122, Number：50, First page：12173, Last page：12183, Dec. 2018, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/acs.jpcb.8b08389
DOI ID：10.1021/acs.jpcb.8b08389, ISSN：1520-6106, eISSN：1520-5207, ORCID：51231052, Web of Science ID：WOS:000454566600035 - Millitesla magnetic field effects on the photocycle of an animal cryptochrome
Dean M. W. Sheppard; Jing Li; Kevin B. Henbest; Simon R. T. Neil; Kiminori Maeda; Jonathan Storey; Erik Schleicher; Till Biskup; Ryan Rodriguez; Stefan Weber; P. J. Hore; Christiane R. Timmel; Stuart R. Mackenzie
SCIENTIFIC REPORTS, Volume：7, Feb. 2017, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1038/srep42228
DOI ID：10.1038/srep42228, ISSN：2045-2322, Web of Science ID：WOS:000393575500001 - Long-Distance Sequential Charge Separation at Micellar Interface Mediated by Dynamic Charge Transporter: A Magnetic Field Effect Study
Tomoaki Miura; Kiminori Maeda; Hisao Murai; Tadaaki Ikoma
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Volume：6, Number：2, First page：267, Last page：271, Jan. 2015, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/jz502495u
DOI ID：10.1021/jz502495u, ISSN：1948-7185, Web of Science ID：WOS:000348093300010 - Sensitive fluorescence-based detection of magnetic field effects in photoreactions of flavins
Emrys W. Evans; Jing Li; Jonathan G. Storey; Kiminori Maeda; Kevin B. Henbest; Charlotte A. Dodson; P. J. Hore; Stuart R. Mackenzie; Christiane R. Timmel
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：17, Number：28, First page：18456, Last page：18463, 2015, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1039/c5cp00723b
DOI ID：10.1039/c5cp00723b, ISSN：1463-9076, eISSN：1463-9084, Web of Science ID：WOS:000357808500028 - Fluorescence-detected magnetic field effects on radical pair reactions from femtolitre volumes
C. A. Dodson; C. J. Wedge; M. Murakami; K. Maeda; M. I. Wallace; P. J. Hore
CHEMICAL COMMUNICATIONS, Volume：51, Number：38, First page：8023, Last page：8026, 2015, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1039/c5cc01099c
DOI ID：10.1039/c5cc01099c, ISSN：1359-7345, eISSN：1364-548X, Web of Science ID：WOS:000353639600007 - Probing a chemical compass: novel variants of low-frequency reaction yield detected magnetic resonance
Kiminori Maeda; Jonathan G. Storey; Paul A. Liddell; Devens Gust; P. J. Hore; C. J. Wedge; Christiane R. Timmel
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：17, Number：5, First page：3550, Last page：3559, 2015, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.1039/c4cp04095c
DOI ID：10.1039/c4cp04095c, ISSN：1463-9076, eISSN：1463-9084, Web of Science ID：WOS:000348203200067 - Broadband Cavity-Enhanced Detection of Magnetic Field Effects in Chemical Models of a Cryptochrome Magnetoreceptor
Simon R. T. Neil; Jing Li; Dean M. W. Sheppard; Jonathan Storey; Kiminori Maeda; Kevin B. Henbest; P. J. Hore; Christiane R. Timmel; Stuart R. Mackenzie
JOURNAL OF PHYSICAL CHEMISTRY B, Volume：118, Number：15, First page：4177, Last page：4184, Apr. 2014, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/jp500732u
DOI ID：10.1021/jp500732u, ISSN：1520-6106, Web of Science ID：WOS:000334731300015 - Spin-selective recombination reactions of radical pairs: Experimental test of validity of reaction operators
Kiminori Maeda; Paul Liddell; Devens Gust; P. J. Hore
JOURNAL OF CHEMICAL PHYSICS, Volume：139, Number：23, Dec. 2013, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1063/1.4844355
DOI ID：10.1063/1.4844355, ISSN：0021-9606, eISSN：1089-7690, Web of Science ID：WOS:000329191300024 - Multielement NMR Studies of the Liquid-Liquid Phase Separation and the Metal-to-Nonmetal Transition in Fluid Lithium- and Sodium-Ammonia Solutions
Matthew T. J. H. Lodge; P. Cullen; Nicholas H. Rees; Neil Spencer; Kiminori Maeda; Jeffrey R. Harmer; Martin O. Jones; Peter P. Edwards
JOURNAL OF PHYSICAL CHEMISTRY B, Volume：117, Number：42, First page：13322, Last page：13334, Oct. 2013, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/jp404023j
DOI ID：10.1021/jp404023j, ISSN：1520-6106, eISSN：1520-5207, Web of Science ID：WOS:000326259800067 - Magnetic field effects in flavoproteins and related systems
Emrys W. Evans; Charlotte A. Dodson; Kiminori Maeda; Till Biskup; C. J. Wedge; Christiane R. Timmel
INTERFACE FOCUS, Volume：3, Number：5, Oct. 2013, [Reviewed]
English
DOI：https://doi.org/10.1098/rsfs.2013.0037
DOI ID：10.1098/rsfs.2013.0037, ISSN：2042-8898, eISSN：2042-8901, Web of Science ID：WOS:000330292600005 - Electron Tunneling in Lithium-Ammonia Solutions Probed by Frequency-Dependent Electron Spin Relaxation Studies
Kiminori Maeda; Matthew T. J. Lodge; Jeffrey Harmer; Jack H. Freed; Peter P. Edwards
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Volume：134, Number：22, First page：9209, Last page：9218, Jun. 2012, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.1021/ja212015b
DOI ID：10.1021/ja212015b, ISSN：0002-7863, eISSN：1520-5126, J-Global ID：201202208927395107, Web of Science ID：WOS:000304837800042 - Magnetically sensitive light-induced reactions in cryptochrome are consistent with its proposed role as a magnetoreceptor
Kiminori Maeda; Alexander J. Robinson; Kevin B. Henbest; Hannah J. Hogben; Till Biskup; Margaret Ahmad; Erik Schleicher; Stefan Weber; Christiane R. Timmel; P. J. Hore
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Volume：109, Number：13, First page：4774, Last page：4779, Mar. 2012, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.1073/pnas.1118959109
DOI ID：10.1073/pnas.1118959109, ISSN：0027-8424, J-Global ID：201202204192769240, Web of Science ID：WOS:000302164200021 - Following Radical Pair Reactions in Solution: A Step Change in Sensitivity Using Cavity Ring-Down Detection
Kiminori Maeda; Simon R. T. Neil; Kevin B. Henbest; Stefan Weber; Erik Schleicher; P. J. Hore; Stuart R. Mackenzie; Christiane R. Timmel
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Volume：133, Number：44, First page：17807, Last page：17815, Nov. 2011, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.1021/ja206783t
DOI ID：10.1021/ja206783t, ISSN：0002-7863, J-Global ID：201102206317486429, PubMed ID：21932826, Web of Science ID：WOS:000296312200049 - Reply to Comment on 'Spin-selective reactions of radical pairs act as quantum measurements'
J. A. Jones; Kiminori Maeda; U. E. Steiner; P. J. Hore
CHEMICAL PHYSICS LETTERS, Volume：508, Number：1-3, First page：184, Last page：185, May 2011, [Reviewed]
English
DOI：https://doi.org/10.1016/j.cplett.2011.04.022
DOI ID：10.1016/j.cplett.2011.04.022, ISSN：0009-2614, eISSN：1873-4448, Web of Science ID：WOS:000290298200037 - Reaction operators for spin-selective chemical reactions of radical pairs
J. A. Jones; Kiminori Maeda; P. J. Hore
CHEMICAL PHYSICS LETTERS, Volume：507, Number：4-6, First page：269, Last page：273, May 2011, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cplett.2011.03.082
DOI ID：10.1016/j.cplett.2011.03.082, ISSN：0009-2614, eISSN：1873-4448, J-Global ID：201102253022965099, Web of Science ID：WOS:000290018500013 - Spin-selective recombination kinetics of a model chemical magnetoreceptor
Kiminori Maeda; Christopher J. Wedge; Jonathan G. Storey; Kevin B. Henbest; Paul A. Liddell; Gerdenis Kodis; Devens Gust; P. J. Hore; Christiane R. Timmel
CHEMICAL COMMUNICATIONS, Volume：47, Number：23, First page：6563, Last page：6565, 2011, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.1039/c1cc11625h
DOI ID：10.1039/c1cc11625h, ISSN：1359-7345, Web of Science ID：WOS:000291113000010 - Entangling Remote Nuclear Spins Linked by a Chromophore
M. Schaffry; V. Filidou; S. D. Karlen; E. M. Gauger; S. C. Benjamin; H. L. Anderson; A. Ardavan; G. A. D. Briggs; K. Maeda; K. B. Henbest; F. Giustino; J. J. L. Morton; B. W. Lovett
PHYSICAL REVIEW LETTERS, Volume：104, Number：20, First page：200501, Last page：200504, May 2010, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1103/PhysRevLett.104.200501
DOI ID：10.1103/PhysRevLett.104.200501, ISSN：0031-9007, Web of Science ID：WOS:000277945900004 - Protein Surface Interactions Probed by Magnetic Field Effects on Chemical Reactions
Kiminori Maeda; Alexander J. Robinson; Kevin B. Henbest; Emma J. Dell; Christiane R. Timmel
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Volume：132, Number：5, First page：1466, Last page：+, Feb. 2010, [Reviewed], [Lead, Corresponding]
English, Scientific journal
DOI：https://doi.org/10.1021/ja908988u
DOI ID：10.1021/ja908988u, ISSN：0002-7863, J-Global ID：201002294807892807, Web of Science ID：WOS:000275084900011 - Effect of magnetic fields on cryptochrome-dependent responses in Arabidopsis thaliana
Sue-Re Harris; Kevin B. Henbest; Kiminori Maeda; John R. Pannell; Christiane R. Timmel; P. J. Hore; Haruko Okamoto
JOURNAL OF THE ROYAL SOCIETY INTERFACE, Volume：6, Number：41, First page：1193, Last page：1205, Dec. 2009, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1098/rsif.2008.0519
DOI ID：10.1098/rsif.2008.0519, ISSN：1742-5689, eISSN：1742-5662, PubMed ID：19324677, Web of Science ID：WOS:000271464500008 - Refolding of ribonuclease A monitored by real-time photo-CIDNP NMR spectroscopy
Iain J. Day; Kiminori Maeda; Howard J. Paisley; K. Hun Mok; P. J. Hore
JOURNAL OF BIOMOLECULAR NMR, Volume：44, Number：2, First page：77, Last page：86, Jun. 2009, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1007/s10858-009-9322-2
DOI ID：10.1007/s10858-009-9322-2, ISSN：0925-2738, eISSN：1573-5001, PubMed ID：19436956, Web of Science ID：WOS:000266140600003 - Radiofrequency polarization effects in zero-field electron paramagnetic resonance
Christopher T. Rodgers; C. J. Wedge; Stuart A. Norman; Philipp Kukura; Karen Nelson; Neville Baker; Kiminori Maeda; Kevin B. Henbest; P. J. Hore; C. R. Timmel
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：11, Number：31, First page：6569, Last page：6572, 2009, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1039/b906102a
DOI ID：10.1039/b906102a, ISSN：1463-9076, eISSN：1463-9084, PubMed ID：19639131, Web of Science ID：WOS:000268481200003 - Radiofrequency polarization effects in low-field electron paramagnetic resonance
C. J. Wedge; Christopher T. Rodgers; Stuart A. Norman; Neville Baker; Kiminori Maeda; Kevin B. Henbest; C. R. Timmel; P. J. Hore
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：11, Number：31, First page：6573, Last page：6579, 2009, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1039/b907915g
DOI ID：10.1039/b907915g, ISSN：1463-9076, eISSN：1463-9084, Web of Science ID：WOS:000268481200004 - SQUID magnetometry as a tool for following a clock reaction in solution
Robert Evans; Kevin B. Henbest; Michael A. Hayward; Melanie M. Britton; Kiminori Maeda; Christiane R. Timmel
DALTON TRANSACTIONS, Number：14, First page：2467, Last page：2469, 2009, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1039/b819977a
DOI ID：10.1039/b819977a, ISSN：1477-9226, eISSN：1477-9234, CiNii Articles ID：80020372064, PubMed ID：19319389, Web of Science ID：WOS:000264555200002 - Quenching Mechanisms and Diffusional Pathways in Micellar Systems Unravelled by Time-Resolved Magnetic-Field Effects
Martin Goez; Kevin B. Henbest; Emma G. Windham; Kiminori Maeda; Christiane R. Timmel
CHEMISTRY-A EUROPEAN JOURNAL, Volume：15, Number：24, First page：6058, Last page：6064, 2009, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1002/chem.200802502
DOI ID：10.1002/chem.200802502, ISSN：0947-6539, CiNii Articles ID：80020387734, PubMed ID：19405051, Web of Science ID：WOS:000267278900024 - Magnetic-field effect on the photoactivation reaction of Escherichia coli DNA photolyase
Kevin B. Henbest; Kiminori Maeda; P. J. Hore; Monika Joshi; Adelbert Bacher; Robert Bittl; Stefan Weber; Christiane R. Timmel; Erik Schleicher
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Volume：105, Number：38, First page：14395, Last page：14399, Sep. 2008, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1073/pnas.0803620105
DOI ID：10.1073/pnas.0803620105, ISSN：0027-8424, PubMed ID：18799743, Web of Science ID：WOS:000259592400032 - Chemical compass model of avian magnetoreception
Kiminori Maeda; Kevin B. Henbest; Filippo Cintolesi; Ilya Kuprov; Christopher T. Rodgers; Paul A. Liddell; Devens Gust; Christiane R. Timmel; P. J. Hore
NATURE, Volume：453, Number：7193, First page：387, Last page：U38, May 2008, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.1038/nature06834
DOI ID：10.1038/nature06834, ISSN：0028-0836, CiNii Articles ID：80019473435, PubMed ID：18449197, Web of Science ID：WOS:000255868400051 - Chemical Magnetoreception: Bird Cryptochrome 1a Is Excited by Blue Light and Forms Long-Lived Radical-Pairs
Miriam Liedvogel; Kiminori Maeda; Kevin Henbest; Erik Schleicher; Thomas Simon; Christiane R. Timmel; P. J. Hore; Henrik Mouritsen
PLOS ONE, Volume：2, Number：10, First page：e1106, Oct. 2007, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1371/journal.pone.0001106
DOI ID：10.1371/journal.pone.0001106, ISSN：1932-6203, PubMed ID：17971869, Web of Science ID：WOS:000207458700023 - Radical cation stabilization in a cucurbituril oligoaniline rotaxane
Rienk Eelkema; Kinninori Maeda; Barbara Odell; Harry L. Anderson
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Volume：129, Number：41, First page：12384, Last page：+, Oct. 2007, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/ja074997i
DOI ID：10.1021/ja074997i, ISSN：0002-7863, PubMed ID：17887677, Web of Science ID：WOS:000250105500022 - Photoionization of TMPD in DMSO solution: mechanism and magnetic field effects
K. B. Henbest; E. Athanassiades; K. Maeda; I. Kuprov; P. J. Hore; C. R. Timmel
MOLECULAR PHYSICS, Volume：104, Number：10-11, First page：1789, Last page：1794, May 2006, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1080/00268970600611017
DOI ID：10.1080/00268970600611017, ISSN：0026-8976, eISSN：1362-3028, Web of Science ID：WOS:000238118900030 - A practical simulation and a novel insight to the magnetic field effect on a radical pair in a micelle
K. Maeda; T. Miura; T. Arai
MOLECULAR PHYSICS, Volume：104, Number：10-11, First page：1779, Last page：1788, May 2006, [Reviewed], [Lead]
English, Scientific journal
DOI：https://doi.org/10.1080/14767050600588106
DOI ID：10.1080/14767050600588106, ISSN：0026-8976, Web of Science ID：WOS:000238118900029 - Measurement of magnetic field effects on radical recombination reactions using triplet-triplet energy transfer
KB Henbest; K Maeda; E Athanassiades; PJ Hore; CR Timmel
CHEMICAL PHYSICS LETTERS, Volume：421, Number：4-6, First page：571, Last page：576, Apr. 2006, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cplett.2006.01.106
DOI ID：10.1016/j.cplett.2006.01.106, ISSN：0009-2614, Web of Science ID：WOS:000236789800052 - The spin mixing process of a radical pair in low magnetic field observed by transient absorption detected nanosecond pulsed magnetic field effect
Tomoaki Miura; Kiminori Maeda; Tatsuo Arai
Journal of Physical Chemistry A, Volume：110, Number：12, First page：4151, Last page：4156, Mar. 2006, [Reviewed]
12, English, Scientific journal
DOI：https://doi.org/10.1021/jp056488d
DOI ID：10.1021/jp056488d, ISSN：1089-5639, CiNii Articles ID：80019269619, PubMed ID：16553365, SCOPUS ID：33645834369 - Spin dynamics of the radical pair in a low magnetic field studied by the transient absorption detected magnetic field effect on the reaction yield and switched external magnetic field
Toshiaki Suzuki; Tomoaki Miura; Kiminori Maeda; Tatsuo Arai
Journal of Physical Chemistry A, Volume：109, Number：44, First page：9911, Last page：9918, Nov. 2005, [Reviewed]
44, English, Scientific journal
DOI：https://doi.org/10.1021/jp053989q
DOI ID：10.1021/jp053989q, ISSN：1089-5639, CiNii Articles ID：80017727100, SCOPUS ID：28144433162 - Dynamics of intramolecular electron transfer reaction of FAD studied by magnetic field effects on transient absorption spectra
M Murakami; K Maeda; T Arai
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：109, Number：26, First page：5793, Last page：5800, Jul. 2005, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/jp0519722
DOI ID：10.1021/jp0519722, ISSN：1089-5639, CiNii Articles ID：80017406565, Web of Science ID：WOS:000230225000004 - Dynamic process of the photo-chemically produced flavin radicals in a neutral micelle studied by a magnetic field effect
M Horiuchi; K Maeda; T Arai
CHEMICAL PHYSICS LETTERS, Volume：394, Number：4-6, First page：344, Last page：348, Aug. 2004, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1016/j.cplett.2004.06.143
DOI ID：10.1016/j.cplett.2004.06.143, ISSN：0009-2614, Web of Science ID：WOS:000223463500023 - Effect of halogen atom on electron spin polarization studied by CIDEP, using halogen substituted aromatic acyl compounds
T Suzuki; K Maeda; T Arai; K Akiyama; S Tero-Kubota
MOLECULAR PHYSICS, Volume：101, Number：22, First page：3341, Last page：3348, Nov. 2003, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1080/00268970310001640193
DOI ID：10.1080/00268970310001640193, ISSN：0026-8976, Web of Science ID：WOS:000188515000010 - Dimerization by hydrogen bonding and photochemical properties of dipyridone
A Matsumoto; K Maeda; T Arai
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：107, Number：47, First page：10039, Last page：10045, Nov. 2003, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/jp034097y
DOI ID：10.1021/jp034097y, ISSN：1089-5639, Web of Science ID：WOS:000186762100004 - Microwave-induced quantum beats in micellized radical pairs under spin-locking conditions
VR Gorelik; K Maeda; H Yashiro; H Murai
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：105, Number：34, First page：8011, Last page：8017, Aug. 2001, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/jp0109628
DOI ID：10.1021/jp0109628, ISSN：1089-5639, CiNii Articles ID：80012580638, Web of Science ID：WOS:000170730100007 - Time-domain observation of external magnetic field effects on the delayed fluorescence of N,N,N ',N '-tetramethyl-1,4-phenylenediamine in alcoholic solution
Y Iwasaki; K Maeda; H Murai
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：105, Number：13, First page：2961, Last page：2966, Apr. 2001, [Reviewed]
English, Scientific journal
DOI：https://doi.org/10.1021/jp002029v
DOI ID：10.1021/jp002029v, ISSN：1089-5639, CiNii Articles ID：80012248165, Web of Science ID：WOS:000167927900007 - Validity and possibility of photoconductivity-detected magnetic resonance (PCDMR) method as one of reaction-yield-detected magnetic resonance (RYDMR) methods
T Itoh; A Matsuyama; K Maeda; H Murai
CHEMICAL PHYSICS LETTERS, Volume：333, Number：3-4, First page：242, Last page：247, Jan. 2001
English, Scientific journal
DOI：https://doi.org/10.1016/S0009-2614(00)01361-0
DOI ID：10.1016/S0009-2614(00)01361-0, ISSN：0009-2614, eISSN：1873-4448, CiNii Articles ID：80012177342, Web of Science ID：WOS:000166468800007 - Improved photo-CIDNP methods for studying protein structure and folding
K Maeda; CE Lyon; JJ Lopez; M Cemazar; CM Dobson; PJ Hore
JOURNAL OF BIOMOLECULAR NMR, Volume：16, Number：3, First page：235, Last page：244, Mar. 2000
English, Scientific journal
DOI：https://doi.org/10.1023/A:1008351128089
DOI ID：10.1023/A:1008351128089, ISSN：0925-2738, Web of Science ID：WOS:000086001600006 - DNP and CIDEP study of cross-relaxation processes in short-lived radicals in solution
Elena G. Bagryanskaya; Gennady S. Ananchenko; Toshio Nagashima; Kiminori Maeda; Sergei Milikisyants; Henning Paul
Journal of Physical Chemistry A, Volume：103, Number：51, First page：11271, Last page：11278, Dec. 1999
American Chemical Society, English, Scientific journal
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DOI ID：10.1021/jp992671t, ISSN：1089-5639, CiNii Articles ID：80011533937, SCOPUS ID：0001484429 - 電子-核スピン分極移動と中間体ラジカルの分子内運動
前田 公憲
Volume：28, Number：1, First page：47, Last page：48, Aug. 1998
Japanese
ISSN：0913-4689, CiNii Articles ID：10020427159, CiNii Books ID：AN10131680 - Effect of polymethylene-chain dynamics on the lifetime of a charge-separated biradical studied by RYDMR spectroscopy
K Enjo; K Maeda; H Murai; T Azumi; Y Tanimoto
JOURNAL OF PHYSICAL CHEMISTRY B, Volume：101, Number：50, First page：10661, Last page：10665, Dec. 1997
English, Scientific journal
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T Fukuju; H Yashiro; K Maeda; H Murai; T Azumi
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：101, Number：42, First page：7783, Last page：7786, Oct. 1997, [Reviewed]
English, Scientific journal
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SS Ali; K Maeda; H Murai; T Azumi
CHEMICAL PHYSICS LETTERS, Volume：267, Number：5-6, First page：520, Last page：524, Mar. 1997
English, Scientific journal
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Y Yamakage; K Maeda; T Azumi
MOLECULAR PHYSICS, Volume：90, Number：3, First page：431, Last page：436, Feb. 1997
English, Scientific journal
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DOI ID：10.1080/002689797172552, ISSN：0026-8976, CiNii Articles ID：80009481580, Web of Science ID：WOS:A1997WK75400013 - The time-resolved ADMR in the photolysis of the polymethylene-linked system of xanthone and xanthene: Power dependence
K Maeda; Y Araki; K Enjo; T Etoh; H Murai; T Azumi
APPLIED MAGNETIC RESONANCE, Volume：12, Number：4, First page：431, Last page：439, 1997
English, Scientific journal
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DOI ID：10.1007/BF03164124, ISSN：0937-9347, Web of Science ID：WOS:A1997XP82200006 - Spin-correlated radical pairs in micellar systems: Mechanism of CIDEP and the micelle size dependence
VF Tarasov; H Yashiro; K Maeda; T Azumi; IA Shkrob
CHEMICAL PHYSICS, Volume：212, Number：2-3, First page：353, Last page：361, Dec. 1996
English, Scientific journal
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K Maeda; Y Araki; Y Kamata; K Enjo; H Murai; T Azumi
CHEMICAL PHYSICS LETTERS, Volume：262, Number：1-2, First page：110, Last page：114, Nov. 1996
English, Scientific journal
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K Shindo; K Yamamoto; K Maeda; T Azumi
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：69, Number：10, First page：2731, Last page：2734, Oct. 1996
English, Scientific journal
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Y YAMAKAGE; QX MENG; SS ALI; K MAEDA; T AZUMI
PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES, Volume：105, Number：6, First page：629, Last page：636, Dec. 1993
English, Scientific journal
ISSN：0253-4134, Web of Science ID：WOS:A1993NJ59100031 - STUDIES OF PHOTOCHEMICAL-REACTION BY CIDNP-DETECTED ESR-SPECTRUM
Q MENG; Y YAMAKAGE; T AIZAWA; K MAEDA; T AZUMI
PROCEEDINGS OF THE INDIAN ACADEMY OF SCIENCES-CHEMICAL SCIENCES, Volume：105, Number：6, First page：619, Last page：628, Dec. 1993
English, Scientific journal
ISSN：0253-4134, Web of Science ID：WOS:A1993NJ59100030 - PHOSPHORESCENCE FROM THE DELOCALIZED TRIPLET-STATE OF POLYSILYLENES
K MAEDA; K SHIMIZU; T AZUMI; M YOSHIDA; K SAKAMOTO; H SAKURAI
JOURNAL OF PHYSICAL CHEMISTRY, Volume：97, Number：47, First page：12144, Last page：12146, Nov. 1993
English, Scientific journal
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K MAEDA; N SUZUKI; T AZUMI
JOURNAL OF PHYSICAL CHEMISTRY, Volume：97, Number：38, First page：9562, Last page：9565, Sep. 1993
English, Scientific journal
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Y YAMAKAGE; QX MENG; K MAEDA; T AZUMI
CHEMICAL PHYSICS LETTERS, Volume：204, Number：5-6, First page：411, Last page：414, Mar. 1993
English, Scientific journal
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QX MENG; K SUZUKI; K MAEDA; M TERAZIMA; T AZUMI
JOURNAL OF PHYSICAL CHEMISTRY, Volume：97, Number：7, First page：1265, Last page：1269, Feb. 1993
English, Scientific journal
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H NAKAMURA; S USUI; Y MATSUDA; T MATSUO; K MAEDA; T AZUMI
JOURNAL OF PHYSICAL CHEMISTRY, Volume：97, Number：3, First page：534, Last page：536, Jan. 1993
English
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DOI ID：10.1021/j100105a002, ISSN：0022-3654, CiNii Articles ID：80006890053, Web of Science ID：WOS:A1993KH92900002 - THE EFFECT OF THE COULOMB FORCE ON THE DIFFUSIONAL MOTION OF RADICALS AS STUDIED BY THE SOLVENT PERMITTIVITY DEPENDENCE OF THE CIDNP INTENSITY
T AIZAWA; T SAKATA; S ITOH; K MAEDA; T AZUMI
CHEMICAL PHYSICS LETTERS, Volume：195, Number：1, First page：16, Last page：20, Jul. 1992
English, Scientific journal
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DOI ID：10.1016/0009-2614(92)85903-N, ISSN：0009-2614, CiNii Articles ID：80006590524, Web of Science ID：WOS:A1992JF88000004 - DETERMINATION OF THE EXCHANGE INTEGRAL BY THE LOW-FIELD CIDNP IN INTRAMOLECULAR HYDROGEN ABSTRACTION REACTION OF POLYMETHYLENE-LINKED XANTHONE AND XANTHENE
K MAEDA; QX MENG; T AIZAWA; M TERAZIMA; T AZUMI; Y TANIMOTO
JOURNAL OF PHYSICAL CHEMISTRY, Volume：96, Number：12, First page：4884, Last page：4889, Jun. 1992
English, Scientific journal
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DOI ID：10.1021/j100191a030, ISSN：0022-3654, CiNii Articles ID：80006537856, Web of Science ID：WOS:A1992HY32200030 - CIDNP AND CIDEP STUDIES ON INTRAMOLECULAR HYDROGEN ABSTRACTION REACTION OF POLYMETHYLENE-LINKED XANTHONE AND XANTHENE - DETERMINATION OF THE EXCHANGE INTEGRAL OF THE INTERMEDIATE BIRADICALS
K MAEDA; M TERAZIMA; T AZUMI; Y TANIMOTO
JOURNAL OF PHYSICAL CHEMISTRY, Volume：95, Number：1, First page：197, Last page：204, Jan. 1991, [Reviewed]
English, Scientific journal
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DOI ID：10.1021/j100154a040, ISSN：0022-3654, CiNii Articles ID：80005650242, Web of Science ID：WOS:A1991ER47300040 - CIDNP and CIDEP Studies on Hydrogen Abstruction of 9, 10 - Authraquinone from Xanthene
TERAZIMA M; MAEDA K; SUGAWARA M; TAKAHASHI S; AZUMI T
Journal of the Chemical Society. Faraday Transactions, Volume：86, Number：2, First page：253, Last page：256, 1990, [Reviewed]
English
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DOI ID：10.1039/ft9908600253, ISSN：0956-5000 - CIDEP Studies on the Intramolecular Hydrogen Abstruction Reaction of Polymethylene Linked System Population Relaxation Between the S-To Mixed States
TERAZIMA M; MAEDA K; AZUMI T; TANIMOTO Y; OKADA N; ITOH M
Chemical Physics Letters, Volume：164, Number：5, First page：562, Last page：566, 1989, [Reviewed]
English
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DOI ID：10.1016/0009-2614(89)85258-3, ISSN：0009-2614, CiNii Articles ID：80004965430
- Magnetic field effect on the photochemical reaction of Flavins
前田 公憲
Volume：46, Number：2, First page：74, Last page：81, Aug. 2015
Japanese
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三浦智明; 前田公憲; 村井久雄
電子スピンサイエンス学会年会講演要旨集, Volume：51st, First page：274, Last page：275, 01 Nov. 2012
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J-Global ID：201202216198121614 - Spectroscopic techniques for exploring the photochemical magnetic compass of migrating birds
MAEDA KIMINORI
分光研究, Volume：61, Number：5, First page：177, Last page：189, 15 Oct. 2012
Japanese
ISSN：0038-7002, J-Global ID：201202205998468394, CiNii Articles ID：10031079495, CiNii Books ID：AN00222531 - Following radical pair reactions to understand the mechanism of the animal magnetoreception.-a step change in sensitivity.
MAEDA Kiminori; NEIL Simon R. T; HENBEST Kevin B; WEBER Stefan; SCHLEICHER Erik; HORE P. J; MACKENZIE Stuart R; TIMMEL Christiana R
電子スピンサイエンス学会年会講演要旨集, Volume：50th, First page：4, Last page：5, 16 Nov. 2011
English
J-Global ID：201102205878064780 - ポリビニルカルバゾ‐ル薄膜の光電導における低磁場効果
駒形圭亮; 生駒忠昭; 生駒忠昭; 前田公憲; HENBEST Kevin B
電子スピンサイエンス学会年会講演要旨集, Volume：49th, First page：52, Last page：53, 11 Nov. 2010
Japanese
J-Global ID：201002256369501167 - タンパク質中の電子移動反応の磁場効果
前田公憲; HENBEST Kevin; ROBINSON Alexander; DELL Ema; NEIL Simon; MACKENZIE Stuart; TIMMEL Christiane
電子スピンサイエンス学会年会講演要旨集, Volume：49th, First page：278, Last page：279, 11 Nov. 2010
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J-Global ID：201002259725553079 - Consistent Treatment of Spin-Selective Recombination of a Radical Pair Confirms the Haberkorn Approach
Konstantin L. Ivanov; Marina V. Petrova; Nikita N. Lukzen; Kiminori Maeda
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：114, Number：35, First page：9447, Last page：9455, 09 Sep. 2010, [Last, Corresponding]
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駒形圭亮; 生駒忠昭; 前田公憲; HENBEST Kevin B
光化学討論会講演要旨集, Volume：2010, First page：96, 08 Sep. 2010
Japanese
J-Global ID：201002280630206273 - Cavity enhanced detection methods for probing the dynamics of spin correlated radical pairs in solution
Simon R. T. Neil; Kiminori Maeda; Kevin B. Henbest; Martin Goez; Robert Hemmens; Christiane R. Timmel; Stuart R. Mackenzie
MOLECULAR PHYSICS, Volume：108, Number：7-9, First page：993, Last page：1003, 2010
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DOI ID：10.1080/00268971003614368, ISSN：0026-8976, eISSN：1362-3028, J-Global ID：201102225630289310, Web of Science ID：WOS:000278110600017 - Effect of magnetic fields on cryptochrome-dependent responses in Arabidopsis thaliana
Sue-Re Harris; Kevin B. Henbest; Kiminori Maeda; John R. Pannell; Christiane R. Timmel; P. J. Hore; Haruko Okamoto
JOURNAL OF THE ROYAL SOCIETY INTERFACE, Volume：6, Number：41, First page：1193, Last page：1205, Dec. 2009
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前田公憲; HENBEST K.B; WEDGE C; LIDDEL P.A; GUST D; TIMMEL C.R; HORE P.J
電子スピンサイエンス学会年会講演要旨集, Volume：48th, First page：50, Last page：51, 10 Nov. 2009
Japanese
J-Global ID：200902288581357570 - リチウムアンモニア,エチルアミンの電子スピン緩和と電子ダイナミクス
前田公憲; LODGE M; HARMER J; JONES M.O; EDWARDS P.P
電子スピンサイエンス学会年会講演要旨集, Volume：48th, First page：146, Last page：147, 10 Nov. 2009
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J-Global ID：200902297688361308 - ポリビニルカルバゾール薄膜における光キャリアダイナミクスの低磁場効果
駒形圭亮; 生駒忠昭; 生駒忠昭; 前田公憲; HENBEST Kevin
光化学討論会講演要旨集, Volume：2009, First page：90, 16 Sep. 2009
Japanese
J-Global ID：200902278489714582 - ENDOR of photo-excited fullerene derivatives
Steven D. Karlen; Vasileia Filidou; Kiminori Maeda; Kevin Henbest; John J. L. Morton; Harry L. Anderson
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, Volume：238, 16 Aug. 2009
English, Summary international conference
ISSN：0065-7727, Web of Science ID：WOS:000207861909462 - Refolding of ribonuclease A monitored by real-time photo-CIDNP NMR spectroscopy
Iain J. Day; Kiminori Maeda; Howard J. Paisley; K. Hun Mok; P. J. Hore
JOURNAL OF BIOMOLECULAR NMR, Volume：44, Number：2, First page：77, Last page：86, Jun. 2009
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DOI ID：10.1007/s10858-009-9322-2, ISSN：0925-2738, eISSN：1573-5001, Web of Science ID：WOS:000266140600003 - SQUID magnetometry as a tool for following a clock reaction in solution
Robert Evans; Kevin B. Henbest; Michael A. Hayward; Melanie M. Britton; Kiminori Maeda; Christiane R. Timmel
DALTON TRANSACTIONS, Number：14, First page：2467, Last page：2469, 2009
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Martin Goez; Kevin B. Henbest; Emma G. Windham; Kiminori Maeda; Christiane R. Timmel
CHEMISTRY-A EUROPEAN JOURNAL, Volume：15, Number：24, First page：6058, Last page：6064, 2009
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Kevin B. Henbest; Kiminori Maeda; P. J. Hore; Monika Joshi; Adelbert Bacher; Robert Bittl; Stefan Weber; Christiane R. Timmel; Erik Schleicher
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Volume：105, Number：38, First page：14395, Last page：14399, Sep. 2008
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Miriam Liedvogel; Kiminori Maeda; Kevin Henbest; Erik Schleicher; Thomas Simon; Christiane R. Timmel; P. J. Hore; Henrik Mouritsen
PLOS ONE, Volume：2, Number：10, First page：e1106, Oct. 2007
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Rienk Eelkema; Kinninori Maeda; Barbara Odell; Harry L. Anderson
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Volume：129, Number：41, First page：12384, Last page：+, Oct. 2007
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前田公憲
電子スピンサイエンス, Number：6, First page：43, Last page：49, 06 Mar. 2006
Japanese
J-Global ID：201002274762752137 - The spin mixing process of a radical pair in low magnetic field observed by transient absorption detected nanosecond pulsed magnetic field effect
T Miura; K Maeda; T Arai
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：110, Number：12, First page：4151, Last page：4156, Mar. 2006
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Volume：110, 12号,4151-4156, 2006
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前田公憲; HENBEST K. B; CINTOLESI F; TIMMEL C. R; HORE P. J
電子スピンサイエンス学会年会講演要旨集, Volume：44th, First page：96, Last page：97, 24 Oct. 2005
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Masaaki Murakami; Kiminori Maeda; Tatsuo Arai
Journal of Physical Chemistry A, Volume：109, Number：26, First page：5793, Last page：5800, 07 Jul. 2005
English
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DOI ID：10.1021/jp0519722, ISSN：1089-5639, PubMed ID：16833913, SCOPUS ID：22344442809 - Dynamics of intramolecular electron transfer reaction of FAD studied by magnetic field effects on transient absorption spectra
M Murakami; K Maeda; T Arai
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：109, Number：26, First page：5793, Last page：5800, Jul. 2005
English
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DOI ID：10.1021/jp0519722, ISSN：1089-5639, Web of Science ID：WOS:000230225000004 - Spin dynamics of the radical pair in low magnetic field studied by transient absorption detected MARY and SEMF.
Volume：109, 44号, 9911-9988, 2005
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DOI ID：10.1021/jp053989q - Spin dynamics of the radical pair in low magnetic field studied by transient absorption detected MARY and SEMF.
The Journal of Physical Chemistry A, Volume：109, 44号, 9911-9988, 2005
DOI：https://doi.org/10.1021/jp053989q
DOI ID：10.1021/jp053989q - An effect of Coulomb interaction on the dynamics of the radical pair in the system of flavin mononucleotide and Henn Egg White Lysozyme (HEWL) studied by a magnetic field effect.
Volume：107, 6974-6978, 2003 - Electron transfer reaction of 4,4'-bipyridine with triethylamine in acetonitrile: effect of water addition on the reaction dynamics
Volume：29,1-10, 2003
DOI：https://doi.org/10.1163/156856703321328361
DOI ID：10.1163/156856703321328361 - An effect of Coulomb interaction on the dynamics of the radical pair in the system of flavin mononucleotide and Henn Egg White Lysozyme (HEWL) studied by a magnetic field effect.
The Journal of Physical Chemistry B, Volume：107, 6974-6978, 2003 - Electron transfer reaction of 4,4'-bipyridine with triethylamine in acetonitrile: effect of water addition on the reaction dynamics
Research on Chemical Intermediate, Volume：29,1-10, 2003
DOI：https://doi.org/10.1163/156856703321328361
DOI ID：10.1163/156856703321328361 - A Time-Resolved EPR Study on the Photoreduction of Phthalic Anhydride and Chlorinated Phthalic Anhydrides in 2-Propanol
Volume：23, 333-347, 2002 - Magnetic field effect on electron transfer reaction of flavin derivatives associated with micelles. Makoto Horiuchi, Kiminori Maeda, Tatsuo Arai
Volume：23, 309-318., 2002 - Structure and kinetics of the intermediate biradicals generated from intramolecular electron transfer reaction of FAD studied by an action spectrum of the magnetic field effect. Masaaki Murakami, Kiminori Maeda, Tatsuo Arai.
Volume：362 123-129, 2002 - Photocleavage reaction of bromine substituted aromatic acyl compounds studied by CIDEP and transient absorption spectroscopy. Toshiaki Suzuki, Yuji Kaneko, Kiminori Maeda, Tatsuo Arai, Kimio Akiyama, Shozo Tero-Kubota
Volume：100 1469-1476, 2002 - A Time-Resolved EPR Study on the Photoreduction of Phthalic Anhydride and Chlorinated Phthalic Anhydrides in 2-Propanol
Applie Magnetic Resonance, Volume：23, 333-347, 2002 - Structure and kinetics of the intermediate biradicals generated from intramolecular electron transfer reaction of FAD studied by an action spectrum of the magnetic field effect. Masaaki Murakami, Kiminori Maeda, Tatsuo Arai.
Chemical Physics. Letters. , Volume：362 123-129, 2002 - Photocleavage reaction of bromine substituted aromatic acyl compounds studied by CIDEP and transient absorption spectroscopy. Toshiaki Suzuki, Yuji Kaneko, Kiminori Maeda, Tatsuo Arai, Kimio Akiyama, Shozo Tero-Kubota
Molecular Physics, Volume：100 1469-1476, 2002 - Photocleavage reaction of bromoacetylnaphthalene studied by FT-EPR and transient absorption spectroscopy. T. Suzuki, Y. Kaneko, K. Maeda, T. Arai, K. Akiyama, S. Tero-Kubota
Volume：No. 44 121-123, 2001 - Quantum beats in confined radical pairs at a strong pulse microwave field. V. Gorelik, K. Maeda, H. Murai
Volume：No. 44 97-99, 2001 - Observation and reaction control of a singlet born radical pair formed photochemically in an SDS micelle. H. Murai, A. Kageyama, T. Fukuju, H. Yashiro, K. Maeda
Volume：No. 44 95-96, 2001 - Time Resolved MARY spectra in the photo cleavage of TMDPO. K. Maeda, T. Suzuki, T. Arai
Volume：No. 44 85-87, 2001 - Photocleavage reaction of bromoacetylnaphthalene studied by FT-EPR and transient absorption spectroscopy. T. Suzuki, Y. Kaneko, K. Maeda, T. Arai, K. Akiyama, S. Tero-Kubota
Riken Review, Volume：No. 44 121-123, 2001 - Quantum beats in confined radical pairs at a strong pulse microwave field. V. Gorelik, K. Maeda, H. Murai
Riken Review, Volume：No. 44 97-99, 2001 - Observation and reaction control of a singlet born radical pair formed photochemically in an SDS micelle. H. Murai, A. Kageyama, T. Fukuju, H. Yashiro, K. Maeda
Riken Review, Volume：No. 44 95-96, 2001 - Time Resolved MARY spectra in the photo cleavage of TMDPO. K. Maeda, T. Suzuki, T. Arai
Riken Review, Volume：No. 44 85-87, 2001 - Observation of two-spin controlling of a radical pair by pulsed irradiation of microwave monitored by absorption detected magnetic resonance
Yasuyuki Araki; Kiminori Maeda; Hisao Murai
Chemical Physics Letters, Volume：332, Number：5-6, First page：515, Last page：520, 29 Dec. 2000
Elsevier, English
DOI：https://doi.org/10.1016/S0009-2614(00)01291-4
DOI ID：10.1016/S0009-2614(00)01291-4, ISSN：0009-2614, CiNii Articles ID：80012116269, SCOPUS ID：0034731189 - Observation of two-spin controlling of a radical pair by pulsed irradiation of microwave monitored by absorption detected magnetic resonance
Y Araki; K Maeda; H Murai
CHEMICAL PHYSICS LETTERS, Volume：332, Number：5-6, First page：515, Last page：520, Dec. 2000
English
DOI：https://doi.org/10.1016/S0009-2614(00)01291-4
DOI ID：10.1016/S0009-2614(00)01291-4, ISSN：0009-2614, CiNii Articles ID：80012116269, Web of Science ID：WOS:000166235900015 - Photoconductivity detected magnetic resonance study on photoinduced electron-transfer reaction of xanthone and N,N-diethylaniline in 2-propanol
A Matsuyama; K Maeda; H Murai
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：103, Number：21, First page：4137, Last page：4140, May 1999
English
DOI：https://doi.org/10.1021/jp9846173
DOI ID：10.1021/jp9846173, ISSN：1089-5639, CiNii Articles ID：80011118236, Web of Science ID：WOS:000080646500002 - Real-time observation of the singlet-triplet dephasing effect on the spin dynamics of the spin-correlated radical pair formed in the photolysis of tetraphenylhydrazine in a micelle
T Fukuju; H Yashiro; K Maeda; H Murai
CHEMICAL PHYSICS LETTERS, Volume：304, Number：3-4, First page：173, Last page：179, Apr. 1999
English
DOI：https://doi.org/10.1016/S0009-2614(99)00320-6
DOI ID：10.1016/S0009-2614(99)00320-6, ISSN：0009-2614, CiNii Articles ID：30003201459, Web of Science ID：WOS:000080032400007 - Delayed fluorescence detected magnetic resonance study on the spin dynamics of the transient radical-ion pair formed in the photolysis of carbazole in 2-propanol
M Nakai; K Maeda; H Murai
CHEMICAL PHYSICS LETTERS, Volume：302, Number：5-6, First page：577, Last page：582, Mar. 1999
English
DOI：https://doi.org/10.1016/S0009-2614(99)00148-7
DOI ID：10.1016/S0009-2614(99)00148-7, ISSN：0009-2614, CiNii Articles ID：80010987605, Web of Science ID：WOS:000079367600032 - Photoconductivity-Detected Magnetic Resonance(PCDMR)Study on Photoinduced Electron-Transfer Reaction of Xanthone and N, N-Diethylaniline in 2-Propanol
Journal of Physical Chemistry, Volume：103, Number：21, First page：4137, Last page：4140, 1999
DOI：https://doi.org/10.1021/jp9846173
DOI ID：10.1021/jp9846173, ISSN：1089-5639, CiNii Articles ID：80011118236 - Real-time observation of the single-triplet dephasing effect on the spin dynamics of the spin-correlated radical pair formed in the photolysis of tetraphenylhydrazine in a micelle
Chemical Physics Letters, Volume：304, Number：3/4, First page：173, Last page：179, 1999
DOI：https://doi.org/10.1016/S0009-2614(99)00320-6
DOI ID：10.1016/S0009-2614(99)00320-6, ISSN：0009-2614, CiNii Articles ID：30003201459 - Delayed Fluorescence Detected Magnetic Resonance study on the spin dynamics of the transient radical-ion pair formed in the photolysis of carbazole in 2-propanol
Chemical Physics Letters, Volume：302, Number：5/6, First page：577, Last page：582, 1999
DOI：https://doi.org/10.1016/S0009-2614(99)00148-7
DOI ID：10.1016/S0009-2614(99)00148-7, ISSN：0009-2614, CiNii Articles ID：80010987605 - Study on the coherent spin motion of the radical-ion pair formed in the laser photolysis of N,N,N ',N '-tetramethyl-1,4-phenylenediamine in 2-propanol
Y Iwasaki; H Murai; K Maeda; T Azumi
CHEMICAL PHYSICS, Volume：230, Number：2-3, First page：201, Last page：208, May 1998
English
DOI：https://doi.org/10.1016/S0301-0104(98)00053-6
DOI ID：10.1016/S0301-0104(98)00053-6, ISSN：0301-0104, CiNii Articles ID：80010329375, Web of Science ID：WOS:000073954600004 - CIDEP study of radical-ion pair systems: Photooxidation reactions of carbazoles by maleic anhydride in alcohol solution
A Sekihara; H Honma; T Fukuju; K Maeda; H Murai
RESEARCH ON CHEMICAL INTERMEDIATES, Volume：24, Number：8, First page：859, Last page：877, 1998
English, Book review
ISSN：0922-6168, Web of Science ID：WOS:000075614300005 - Time-resolved ESR in a spin-correlated radical pair with large hyperfine coupling constant at P-31. Micellar size effects and the role of flip-flop transitions
VF Tarasov; H Yashiro; K Maeda; T Azumi; IA Shkrob
CHEMICAL PHYSICS, Volume：226, Number：3, First page：253, Last page：269, Jan. 1998
English
DOI：https://doi.org/10.1016/S0301-0104(97)00330-3
DOI ID：10.1016/S0301-0104(97)00330-3, ISSN：0301-0104, CiNii Articles ID：80010179746, Web of Science ID：WOS:000072161800002 - The SNP Measurement of the Elecrton Transfer Reaction from Quadricyclane to Tetrafluoro-P-Benzoquinone
Volume：11, First page：441, Last page：447, 1997 - Reaction-Yield-Detected Magnetic Resonance in the Intra-and Intermolecular Electron Transfer Reactions
Volume：11, First page：423, Last page：430, 1997 - Several RYDMR Studies on the Radical-Ion Pair Formed in the Photolysis of TMPD : Photoconductivity, Transient-Absorption and Fluorescence Detected Methods
Volume：11, First page：411, Last page：422, 1997 - Excited-state properties of the ligand-localized (3)pi pi* state of cyclometalated ruthenium(II) complexes
S Kimachi; R Satomi; H Miki; K Maeda; T Azumi; M Onishi
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：101, Number：4, First page：345, Last page：349, Jan. 1997
English
DOI：https://doi.org/10.1021/jp961018s
DOI ID：10.1021/jp961018s, ISSN：1089-5639, CiNii Articles ID：80009515575, Web of Science ID：WOS:A1997WL08500004 - Contolling of Radical-Ion Pair Reactions with Microwave radiation : Photoconductivity-detected Magnetic Resonance.
MURAI H; MATSUYAMA A; ISHIDA T; IWASAKI Y; MAEDA K; AZUMI T
Volume：264, Number：6, First page：619, Last page：622, 1997
DOI：https://doi.org/10.1016/S0009-2614(96)01383-8
DOI ID：10.1016/S0009-2614(96)01383-8, ISSN：0009-2614, CiNii Articles ID：80009418688 - The SNP Measurement of the Elecrton Transfer Reaction from Quadricyclane to Tetrafluoro-P-Benzoquinone
Applied Magnetic Resonance, Volume：11, First page：441, Last page：447, 1997 - Reaction-Yield-Detected Magnetic Resonance in the Intra-and Intermolecular Electron Transfer Reactions
Applied Magnetic Resonance, Volume：11, First page：423, Last page：430, 1997 - Several RYDMR Studies on the Radical-Ion Pair Formed in the Photolysis of TMPD : Photoconductivity, Transient-Absorption and Fluorescence Detected Methods
Applied Magnetic Resonance, Volume：11, First page：411, Last page：422, 1997 - Excited-state properties of the ligand-localized (3)pi pi* state of cyclometalated ruthenium(II) complexes
S Kimachi; R Satomi; H Miki; K Maeda; T Azumi; M Onishi
JOURNAL OF PHYSICAL CHEMISTRY A, Volume：101, Number：4, First page：345, Last page：349, Jan. 1997
English
DOI：https://doi.org/10.1021/jp961018s
DOI ID：10.1021/jp961018s, ISSN：1089-5639, Web of Science ID：WOS:A1997WL08500004 - Contolling of Radical-Ion Pair Reactions with Microwave radiation : Photoconductivity-detected Magnetic Resonance.
Chemical Physics Letters, Volume：264, Number：6, First page：619, Last page：622, 1997
DOI：https://doi.org/10.1016/S0009-2614(96)01383-8
DOI ID：10.1016/S0009-2614(96)01383-8, ISSN：0009-2614, CiNii Articles ID：80009418688 - Time-Resolved CIDNP-Detected ESR Spectrum in the Photochemical Hydrogen Abstraction Reaction of Benzoquinone
Volume：6, First page：393, Last page：395, 1995 - Low field CIDNP-Detected ESR Spectrwn of Intermedicate Radicul Pair in Photoinduced Hydrogen Abstraction Reaction
Volume：6, First page：407, 1995 - Photochemical Hydrogen Abstraction Reaction of 2,6-dichloro-P-benzoguinone as Studied by Nuclear-Spin-Dolarization-Detected ESR Spectroscopy
Volume：107, First page：831, 1995 - CIDNP-Detected ESR Spectrum in the Photoinduced Electron Transfer Reaction
Volume：6, 1995 - CIDNP Studies on the Photochemical Reaction of 4-Methyl-2-quinolinecarbonitrile with Optically Active (S)- or (R)-2-Phenylpropionic Acid. No evidence for the Chiral Symmetry Breaking
Volume：227, 1995
DOI：https://doi.org/10.1246/cl.1995.227
DOI ID：10.1246/cl.1995.227 - Time-Resolved CIDNP-Detected ESR Spectrum in the Photochemical Hydrogen Abstraction Reaction of Benzoquinone
Magnetic Resonance in Medicine, Volume：6, First page：393, Last page：395, 1995 - Low field CIDNP-Detected ESR Spectrwn of Intermedicate Radicul Pair in Photoinduced Hydrogen Abstraction Reaction
Magnetic Resonance in Medicine, Volume：6, First page：407, 1995 - Photochemical Hydrogen Abstraction Reaction of 2,6-dichloro-P-benzoguinone as Studied by Nuclear-Spin-Dolarization-Detected ESR Spectroscopy
Proceeding of Indian Academy of Science, Volume：107, First page：831, 1995 - CIDNP-Detected ESR Spectrum in the Photoinduced Electron Transfer Reaction
Magnetic Resonance in Medicine, Volume：6, 1995 - CIDNP Studies on the Photochemical Reaction of 4-Methyl-2-quinolinecarbonitrile with Optically Active (S)- or (R)-2-Phenylpropionic Acid. No evidence for the Chiral Symmetry Breaking
Chemistry Letters, Volume：227, 1995
DOI：https://doi.org/10.1246/cl.1995.227
DOI ID：10.1246/cl.1995.227 - Direct Analysis of Hydrogen Transfer Reaction from P-Benzosemiquinone Radical to P-Benzoquinone hy Time Resolved CIDNP Method.
Volume：50A, First page：1943, 1994 - Direct Analysis of Hydrogen Transfer Reaction from P-Benzosemiquinone Radical to P-Benzoquinone hy Time Resolved CIDNP Method.
Spectrochim. Acta, Volume：50A, First page：1943, 1994 - CIDNP-Detected ESR Spectrometer
Volume：76, First page：7, Last page：15, 1993 - X-band CIDNP detected ESR spectron in the hydrogen abstraction reaction of the carbonyl compounds
Volume：182, First page：99, 1993 - DNP Spectrum observed in the Photolysis of Benzoquinone and Some of Its Methyl Derivatives. The Triplet Mechanism in CIDNP
Volume：180,95, 1993 - CIDNP-Detected ESR Spectrometer
Science Reports Tohoku Universuty, First Series,, Volume：76, First page：7, Last page：15, 1993 - X-band CIDNP detected ESR spectron in the hydrogen abstraction reaction of the carbonyl compounds
Zeitschcrift f(]E88DB[)r Physikalish Chemie, Volume：182, First page：99, 1993 - DNP Spectrum observed in the Photolysis of Benzoquinone and Some of Its Methyl Derivatives. The Triplet Mechanism in CIDNP
Zeitschcrift fur Physikalish Chemie, Volume：180,95, 1993 - Time-resolved DNP study on the hydrogen abstraction reaction of benzaldehyde
Applied Magnetic Resonance, Volume：5,177, 1993 - Time-resolved DNP study on the hydrogen abstraction reaction of benzaldehyde
Volume：5,177, 1993 - CIDNP AND CIDEP STUDIES ON INTRAMOLECULAR HYDROGEN ABSTRACTION REACTION OF POLYMETHYLENE-LINKED XANTHONE AND XANTHENE - DETERMINATION OF THE EXCHANGE INTEGRAL OF THE INTERMEDIATE BIRADICALS
K MAEDA; M TERAZIMA; T AZUMI; Y TANIMOTO
JOURNAL OF PHYSICAL CHEMISTRY, Volume：95, Number：1, First page：197, Last page：204, Jan. 1991
English
DOI：https://doi.org/10.1021/j100154a040
DOI ID：10.1021/j100154a040, ISSN：0022-3654, CiNii Articles ID：80005650242, Web of Science ID：WOS:A1991ER47300040 - CIDNP and CIDEP Studies on Hydrogen Abstruction of 9, 10 - Authraquinone from Xanthene
Journal of Chemical Society Faraday Transaction, Volume：86, Number：2, First page：253, Last page：256, 1990
DOI：https://doi.org/10.1039/ft9908600253
DOI ID：10.1039/ft9908600253, ISSN：0956-5000 - CIDEP Studies on the Intramolecular Hydrogen Abstruction Reaction of Polymethylene Linked System Population Relaxation Between the S-To Mixed States
Chemical Physics Letters, Volume：164, Number：5, First page：562, Last page：566, 1989
DOI：https://doi.org/10.1016/0009-2614(89)85258-3
DOI ID：10.1016/0009-2614(89)85258-3, ISSN：0009-2614, CiNii Articles ID：80004965430 - Magnetic field effect on electron transfer reaction of flavin derivatives associated with micelles. Makoto Horiuchi, Kiminori Maeda, Tatsuo Arai
Applied Magnetic Ressonance, in press.
- 核スピン分極からみた分子磁性の動的挙動
1996 - Temperature Dependence of the Magnetic Field Effect of the CIDNP in the Photocleavage of Cycloalkanone.
1992 - Temperature Dependence of the Magnetic Field Effect of the CIDNP in the Photocleavage of Cycloalkanone.
Spin Chemistry, 1992 - Effect of Colomb Force on Diffusion as Studied by CIDNP Intensities of Photo-Induced Electron Transter Reactions of trans-Stilbene.
1991 - CIDNP and CIDEP Studies on Intramolecular Hydrogen Abstruction Reaction of Polyrethylene Linked System
1991 - Effect of Colomb Force on Diffusion as Studied by CIDNP Intensities of Photo-Induced Electron Transter Reactions of trans-Stilbene.
Spin Chemistry, 1991 - CIDNP and CIDEP Studies on Intramolecular Hydrogen Abstruction Reaction of Polyrethylene Linked System
Spin Chemistry, 1991
- Electron dynamics in Lithium Ammonia Solution Probed by X and W-band Pulse EPR
2010 - 2SA1-07 Does a migrating bird watch the earth magnetic field?(2SA1 Electron Spin Resonance on Biophysics -The Next Generation-,The 47th Annual Meeting of the Biophysical Society of Japan)
Maeda Kiminori
Biophysics, Sep. 2009, The Biophysical Society of Japan
Sep. 2009 - Sep. 2009, English - Magnetic Field Effects on the photochemical reactions in protein systems
2009 - Does a migrating bird watch the earth magnetic field?
2009 - Quantum Spin dynamics appears in the chemical reaction of radical pairs
2009 - Spin dynamics of the model system of a chemical compass using pulsed EPR and transient absorption techniques
2009 - “Magnetic Field Effects in Biological Systems”
2007 - ”A photochemical compass”
2007 - Anisotropic magnetic field effect observed in the model system of the photochemical compass
2007 - Oscillating magnetic field effects on photochemical reactions studied by time-resolved laser flash photolysis
2006 - “Extremely low magnetic field effects towards a photochemical compass”
2006 - Probing the spin mixing process of radical pairs by nano-second pulsed magnetic fields
2005 - Probing the dynamics of flavin radical and its radical pair in confined systems by magnetic field effects on transient absorption
2004 - “A contribution of the Magnetic Field Effects to Flavin Photochemistry”
2003 - Spin Chemistry in the electron transfer reaction of flavin derivatives
2003 - Application of the Magnetic Spin Effect to Exploring Photochemical Reactions of Flavin Derivatives
2003 - Effects of the various environments on the radical pair dynamics in electron transfer reactions of flavin derivatives
2002 - “Applications of magnetic spin effect on the electron transfer reactions of flavin derivatives”
2002
■ Research projects
- 任意波形磁気共鳴と磁場方向スイッチングによる新しいスピン操作と反応制御
Jun. 2023 - Mar. 2026
Grant amount(Total)：6500000, Direct funding：5000000, Indirect funding：1500000
Grant number：23K17662 - マイクロ波とラジオ波を用いたスピン化学の手法による選択的同位体濃縮
30 Jul. 2020 - 31 Mar. 2024
Grant amount(Total)：25740000, Direct funding：19800000, Indirect funding：5940000
Grant number：20K20557 - 3 dimensional imaging of photochemical quantum magnetic compasses.
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 01 Apr. 2018 - 31 Mar. 2023
Saitama University
Grant amount(Total)：15990000, Direct funding：12300000, Indirect funding：3690000
Grant number：18H01184 - Does protein clustering play a role in biological magnetoreception?
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for JSPS Fellows, 12 Oct. 2018 - 31 Mar. 2020
Saitama University
Grant amount(Total)：2200000, Direct funding：2200000
Grant number：18F18789 - Studies on interfacial electron transfer in the nonionic vesilcels towards development of photo and magneto functional materials
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Oct. 2015 - Mar. 2019
MIURA Tomoaki; Ikoma Tadaaki; Maeda Kiminori, Niigata University
Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
Niosomes are bilayer membrane capsules, which can be prepared very easily by dispersing low cost detergent molecules in water. They recently draws much attention as drug delivery materials for medical uses. In this project, basic researches have been carried out for development of novel materials such as photo- and magnetically controlable drug delivery and magnetically enhanecd artificial photosynthesis. Newly developed niosome capsules that involve a pigment and a vitamin molecule give the long-lived charge-separated state upon photo-irradiation, of which the lifetime is greatly enhanced by applied magnetic field. Multi-step electron transfer, which is important for artificial photosynthesis, is realized by utizling the niosome capsule. Preliminary results that indicate photo-control of the membrane structure, which is important for drug delivery, have also been presented.
Grant number：15K05384 - Quantum interference to charge recombination reactions by strong magnetic fields
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Challenging Exploratory Research, 01 Apr. 2015 - 31 Mar. 2017
MAEDA Kiminori, Saitama University
Grant amount(Total)：3250000, Direct funding：2500000, Indirect funding：750000
In order to clarify the quantum mechanical effect in radical pair mechanism, which is considered to be the cause of magnetic compass of migratory birds, we built a new setup for measurement of magnetic field effects (MFEs) with high sensitivity and stability that allows the precise analysis of the magnetic field effect on reaction yield (MARY) spectrum in time resolved manner. In the flavin system, we succeeded in measuring the magnetic field effect with very high stability, and discovered the time evolution of the MARY spectral shape. We calculated these phenomena based on quantum mechanics and could explain the time evolution of the spectra by an effect of the spin dephasing. The spin dephasing is one of the most important phenomena in the discussion of the magnetoreception of the very small magnetic field. This result should have an impact on the discussion of the relationship of the spin dynamic and the molecular magnetoreceptions.
Grant number：15K13547 - スピン選択的化学反応の量子ダイナミクス
29 Aug. 2014 - 31 Mar. 2015
Grant amount(Total)：1300000, Direct funding：1000000, Indirect funding：300000
Grant number：26888004 - 疎水的環境場を持つ分子集合系と生体高分子を利用した光化学反応制御
2002 - 2002
Grant amount(Total)：2900000, Direct funding：2900000
Grant number：14050018 - 超分子システム中における低磁場中でのスピンダイナミクス操作による化学反応制御
2001 - 2002
Grant amount(Total)：2100000, Direct funding：2100000
Grant number：13740320 - 局所的反応場とスピン対の量子制御に基づく化学反応制御
1999 - 2000
Grant amount(Total)：2300000, Direct funding：2300000
Grant number：11740304 - SPIN CHEMISTRY OF MEMBRANE INTERFACE
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B)., 1999 - 2000
MURAI Hisao; MAEDA Kiminori, TOHOKU UNIVERSITY
Grant amount(Total)：4300000, Direct funding：4300000
We used this grant project mainly for the purpose of exchange of scientists and discussion of scientific information about the spin chemical phenomena of membrane interface. Our final aim of this project is the investigation of biological active membrane, but the basic physical understanding of the interface is much more important to start the studies. During the project period, we invited several scientists who were experts of spin effect and membrane phenomenon. Murai visited University of North Carolina and Oxford University to discuss and obtain information concerning membranes. Maeda also visited Oxford University to discuss the application of magnetic resonance to the investigation of biological systems. In this project we employed several different micellar and bilayer systems. The methods of the observation of the spin effects in the membrane interface were 1) time-resolved ESR and 2) reaction yield detected magnetic resonance. Especially, method 2) was newly developed technique and a transient optical absorption detection was mainly used to monitor the reaction change by the irradiation of microwave under the conditions of electron spin resonance. Using method 2), we studied a singlet born radical pair system in an SDS micelle employing tetraphenylhydrazine. In this study we succeeded in effective spin flip operation and chemical reaction control in the micellar solution. Method 2) was also applied to the photoreduction system of xanthone and t-butylphenol derivatives in an SDS micelle. We discovered a quantum beat phenomenon of two-spin simultaneous excitation by microwave. From the data of the quantum beat we concluded that the decay of the beat is mainly due to the triplet-triplet dephasing that is a new concept of spin-phase relaxation in radical pair systems. Our recent aim of the project is photochemical electron labeling of a bilayer system and the investigation using method 1) is underway.
Grant number：11694052 - OBSERVATION OF QUANTUM COHERENCE OF PARAMAGNETIC SPECIES BY MEANS OF SUDDEN MAGNETIC FIELD JUMP
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B)., 1998 - 2000
MURAI Hisao; MAEDA Kiminori, TOHOKU UNIVERSITY
Grant amount(Total)：15300000, Direct funding：15300000
This project aims at the observation and deep investigation of the spin coherent phenomenon of radical pairs formed transiently by photochemical method. We employed two different methods under the existence of radical pairs : 1) sudden jumping of the external magnetic field, 2) quick switching of the electromagnetic field (microwave field) under the conditions of the electron spin resonance. The radical pairs are prepared using a laser pulse irradiation to several solutions. The systems we employed were a) polymethylene-linked biradical, b) radical-ion pairs formed by photoinduced electron transfer reaction, c) micellar systems that include transiently formed radical pairs. Method 1) was applied to the the system b) and it showed the controlled reaction by the magnetic field jump, but we realized the difficulty of the theoretical handling of low magnetic field phenomenon. This study is still under investigation. Method 2) provided many new discoveries about the spin dynamics of radical pair and radical-ion pair systems. First of all, we succeeded in observing the different spin quantum beats of several radical pair systems. The beat data showed the double tequency signal due to simultaneous excitation of the component radicals of radical pairs by microwave field. The decay of the beat signal was proved to be due to the triplet-triplet dephasing phenomenon probably induced by anisotropic dipole-dipole interaction in the radical pair. Another important finding is the appearance of a broadened spectral pattern under the strong microwave field, that was also rationalized by the spin dephasing effect. This project apparently demonstrated that the switching of the external field and/or the electromagnetic alternating field can control the chemical reaction pathways and it also provides a lot of important information about the spin and chemical dynamics of photochemical systems.
Grant number：10440164 - 局所的反応場とスピン対の量子制御に基づく化学反応制御
1998 - 1998
Grant amount(Total)：1300000, Direct funding：1300000
Grant number：10740262 - Photochemically formed contact radical pair and its unusual spin polarization
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 1996 - 1997
MURAI Hisao; OKADA Keiji; MAEDA Kiminori, TOHOKU UNIVERSITY
Grant amount(Total)：7600000, Direct funding：7600000
The aim of this project is to clarify the dynamics of the radical-ion pairs and contact radical pairs formed transiently in photochemical reactions using new detection techniques of a photoconductivity detected magnetic resonance (PCDMR) and a transient absorption detected magnetic resonance (ADMR).
1996 : The photoionization process of TMPD in alcohol by way of the radical-ion pair was investigated by PCDMR and ADMR methods. The sample solutions previously deoxygenated were photolyzed in the ESR cavity, and the conductivity change was monitored under the ESR conditions by applying strong microwave power. We finally succeeded in the observation of the transient radical-ion pair. This was the first report of the observation of the radical-ion pair using PCDMR method in the world. The trial of the observation of the transient absorption (optical) under ESR conditions proved that the PCDMR spectrum was the observation of the real radical-ion pair. The spectrum was broadened probably due to the dynamic properties of the radical-ion pair, and the formation of the contact radical pair having short lifetime was the main cause of the broadening. Theoretical analysis was also performed.
1997 : We investigated a system of the photoinduced electron transfer reaction using the PCDMR technique. The deoxygenated solution of xanthone and N,N-diethylaniline in 2-propanol was used as the sample. This system is known to show large external magnetic field effect contrary to its homogeneous conditions. Finally, we succeeded in observing the PCDMR spectrum of the radical-ion pair composed of xanthone anion and diethylaniline cation radicals. We also succeeded in determining the lifetime of the radical-ion pair to be about 200 ns. That is extremely long comparing with the ordinary radical pair in 2-propanol under the same conditions. This long lifetime is the main cause of the large external magnetic field effect. This Iong lifetime may be due to the network formation between the radical-ion pair and alcohol molecules. The spectrum showed a forbidden transition of ESR under very strong microwave radiation. This implies that two radical ions are fluctuating and frequently they encounter in close distance such as the contact radical pair.
Grant number：08454172 - ラジカル対におけるスピン対相関のダイナミクスおよび緩和現象の高速観測
1996 - 1996
Grant amount(Total)：1100000, Direct funding：1100000
Grant number：08740437 - Reaction control by the accerelation and the decerelation of the intersystem crossing by microwave irradiation.
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), 1995 - 1996
AZUMI Tohru; FUJII Kanae; MAEDA Kiminori, Tohoku University
Grant amount(Total)：4300000, Direct funding：4300000
In this project we have tried to clear the effect of the microwave irradiation on the spin correlation of the radical pair (RP), and to control the photochemical reaction by this effect. For these purpose, we performed the investigation on the following subjects. (1) Construction of the new time-resolved RYDMR (Reaction Yield Detected Magnetic Resonance) and SNP (Stimulate Nuclear Polarization) detection system. For the investigation of the spin correlation of the radical pair, we need a method to observe the spin correlation in fast time resolution (-ns). We apply the various techniques (detection of emission, transient absorption, nuclear polarization, and photo-conductivity) for the observation of the microwave effect on the dynamics of the radical pair. (2) Discussion of the time-resolved ADMR spectra observed in the polymethylene-linked xanthone and xanthene. (3) Observation of the effect of the pulsed microwave on the spin dynamics of RP.(4) The spin dynamics of the RP in the micellar supercage studied by the time-resolved ESR and the stimulated nuclear polarization (SNP) spectra.
Grant number：07554064 - マイクロ波パルスによるラジカル対スピンダイナミクスの量子制御
1995 - 1995
Grant amount(Total)：2100000, Direct funding：2100000
Grant number：07228206 - スピン相関操作を利用した光化学反応制御
1994 - 1994
Grant amount(Total)：2200000, Direct funding：2200000
Grant number：06239207 - 強いマイクロ波パルス照射による光反応制御
1993 - 1993
Grant amount(Total)：900000, Direct funding：900000
Grant number：05740345 - Development of the CIDNP-detected Electron Spin Resonance Apparatus for the Aid of Investigation of Radical Pairs
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Developmental Scientific Research (B), 1991 - 1993
AZUMI Tohru; FUJII Kanae; MAEDA Kiminori, TOHOKU UNIVERSITY
Grant amount(Total)：10100000, Direct funding：10100000
In most of chemical reactions in solution, the whole fate of the reaction path is governed by the small interaction that is operative within a short lifetime of radical pairs. In this respect one whishes to observe the spectrum of radical pairs and analyze it to fully understand chemical reactions. However, in any conventional spectroscopy, the spectrum due to radical pairs and that due to free radicals cannot be separately observed.
The CIDNP-detected ESR spectroscopy has been developed in order to separately obseve the ESR spectrum of radical pairs and that of free radicals. We have further tried to extend this spectroscopy to time-resolved spectroscopy.
By this new spectroscopy, a lot of chemical reactions have been investigated. As an example, the photo-induced hydrogen abstraction reaction of dichlorobenzoquinone has been investigated. It has found that the hydroxybenzoquinone radical that exists as a radical pair and that exists as a free radical are different. This amazing conclusion can never be obtained by any other spectroscopic means. Further, the lifetime of radical pairs was determined as 20 ns.
Grant number：03554013 - 低磁場中における光化学反応中間体のスピンダイナミクスに関する研究
1992 - 1992
Grant amount(Total)：900000, Direct funding：900000
Grant number：04740271 - 閉殻配置をもつ金属イオンの錯体におけるd-π相互作用
1992 - 1992
Grant amount(Total)：2000000, Direct funding：2000000
Grant number：04640466 - Opto-magnetic studies of metal-ligand interactions in transition metal complexes having closed shell configurations
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for international Scientific Research, 1990 - 1992
AZUMI Tohru; IKEYAMA Takeshi; MAEDA kiminori; CROSBY Glenn A., Tohoku University
Grant amount(Total)：7900000, Direct funding：7900000
Spectroscopic and magnetic properties have been investigated for complexes of d^<10> closed shell metal ions, and the results of significance are summarized as follows.
(1) Mixed ligand complexes of the type Zn(X-PhS)_2(phen)
The triplet sublevels associated with the lowest ligand charge transfer (LLCT) triplet excited state have been investigated for a series of the complexes of the type Zn(X-PhS)_2(phen), where X is a substituent on the benzenthiol ligand and phen is 1,10-phenanthroline. The zero field splitting parameters D* are significantly larger than the values calculated quantum mechanically based on a model of pure charge transfer state. This discrepany suggests that the phen localized pipi* states mixes with the LLCT state. The degree of mixing is obtained based on this mixing mechanism from the results of both the lifetime and the zero field splitting. The mixing coefficients determined show a good and expected correlation with the electron donating ability of the substituent X on benzenethiol. Thus, the participation of LLCT to phen localized pipi* state is well substantiated.
(2) Complexes of the type MX_2(phen)
Fluorescence and the triplet sublevel properties have been investigated for a series of complexes of the type MX_2(phen), where M is Zn(II) or Cs(II) and X is C1, Br, or I. The fluorescence lifetime, zero field splittings,and the radiative rate constants for sublevels are all interpreted satisfactorily by a theoretical model in which the phen localized pipi* state mixes with charge transfer state arising from the electron promotion from p orbital of halogen to pi* orbital phen.
Grant number：02044011 - CIDNP検出ESR法によるラジカル対内の構造変化と反応
1991 - 1991
Grant amount(Total)：2100000, Direct funding：2100000
Grant number：03640422 - 光化学反応、反応中間体のスピンダイナミクス、動物の地磁気感受システム、化学コンパス、電子スピン共鳴
Competitive research funding