Performance information

• Analytical model for spin dynamics in radical pairs under the spin-locking condition　　　　　　　　　　　　　　　
  Tomoaki Yago
  The Journal of Chemical Physics, Jun. 2024, [Reviewed]
  Spin dynamics in triplet radical pairs are theoretically studied under the spin-locking condition, where singlet–triplet mixing is blocked by the resonant microwave field. A key assumption in the theory is simultaneous excitations of T+–T0 and T−–T0 transitions in triplet radical pairs. This assumption allows for the application of a three-state model [Yago, J. Chem. Phys. 151, 214501 (2019)] to describe the spin dynamics of triplet radical pairs. The analysis based on the three-state model shows that the triplet states are quantized along the direction of a microwave-induced magnetic field (B1) in the rotating frame under the spin-locking condition. This gives rise to a new spin-locking phenomenon where T+–T0 and T−–T0 mixing are most enhanced at magnetic fields that deviate from the resonance by ±B1. It is also shown that the quantum beats observed under the spin-locking condition originate from the spin dynamics in triplet radical pairs.
  English, Scientific journal
  DOI：https://doi.org/10.1063/5.0210982
  DOI ID：10.1063/5.0210982, ISSN：0021-9606, ORCID：162625020
• Triplet–Triplet Annihilation via the Triplet Channel in Crystalline 9,10-Diphenylanthracene
  Tomoaki Yago; Manami Tashiro; Kiichi Hasegawa; Masao Gohdo; Syuta Tsuchiya; Tadaaki Ikoma; Masanobu Wakasa
  The Journal of Physical Chemistry Letters, Volume：13, Number：37, First page：8768, Last page：8774, Sep. 2022, [Reviewed]
  American Chemical Society (ACS), Scientific journal
  DOI：https://doi.org/10.1021/acs.jpclett.2c01839
  DOI ID：10.1021/acs.jpclett.2c01839, ISSN：1948-7185, eISSN：1948-7185
• Singlet Fission in Solid 1,6-Diphenyl-1,3,5-hexatriene Dicarboxylic Acids and Esters: Effects of Meta and Para Substitution
  Sonoda, Y.; Katoh, R.; Tohnai, N.; Yago, T.; Wakasa, M.
  Journal of Physical Chemistry C, Volume：126, Number：20, May 2022, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.2c01474
  DOI ID：10.1021/acs.jpcc.2c01474, ISSN：1932-7455, ORCID：118982417, SCOPUS ID：85130817952
• Low magnetic field effects on a photoinduced electron transfer reaction in an ionic liquid
  Harada, N.; Matsuo, T.; Yago, T.; Maeda, K.; Wakasa, M.
  Chemical Physics Letters, Volume：773, First page：138569, Last page：138569, Jun. 2021, [Reviewed]
  Elsevier {BV}, English, Scientific journal
  DOI：https://doi.org/10.1016/j.cplett.2021.138569
  DOI ID：10.1016/j.cplett.2021.138569, ISSN：0009-2614, ORCID：92401171, SCOPUS ID：85103761543
• Initializing 214 Pure 14-Qubit Entangled Nuclear Spin States in a Hyperpolarized Molecular Solid
  Gerd Kothe; Michail Lukaschek; Tomoaki Yago; Gerhard Link; Konstantin L. Ivanov; Tien-Sung Lin
  The Journal of Physical Chemistry Letters, Volume：12, Number：14, First page：3647, Last page：3654, Apr. 2021, [Reviewed]
  American Chemical Society ({ACS}), English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpclett.1c00726
  DOI ID：10.1021/acs.jpclett.1c00726, ISSN：1948-7185, ORCID：95380279, SCOPUS ID：85104370232
• Geminate delayed fluorescence by anisotropic diffusion-mediated reversible singlet fission and triplet fusion
  Seki, K.; Yoshida, T.; Yago, T.; Wakasa, M.; Katoh, R.
  Journal of Physical Chemistry C, Volume：125, Number：6, First page：3295, Last page：3304, Feb. 2021, [Reviewed]
  American Chemical Society ({ACS}), Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.0c10582
  DOI ID：10.1021/acs.jpcc.0c10582, ORCID：90660190, SCOPUS ID：85101935362
• Erratum: Low magnetic field effects on triplet pair annihilations at canonical orientations (J. Chem. Phys. (2019) 151 (214501) DOI: 10.1063/1.5127904)　　　　　　　　　　　　　　　
  T. Yago
  Journal of Chemical Physics, Volume：153, Number：16, Oct. 2020
  American Institute of Physics Inc., English, Scientific journal
  DOI：https://doi.org/10.1063/5.0031228
  DOI ID：10.1063/5.0031228, ISSN：1089-7690, PubMed ID：33138401, SCOPUS ID：85095403511
• Diffusion of Radical Ions in Ionic Liquids Having Long Alkyl Chains　　　　　　　　　　　　　　　
  Tsuchida, H.; Takeda, T.; Ishii, Y.; Yago, T.; Wakasa, M.
  Journal of Physical Chemistry B, Volume：123, Number：40, 2019, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcb.9b06007
  DOI ID：10.1021/acs.jpcb.9b06007, ISSN：1520-5207, ORCID：89742182, SCOPUS ID：85073124117, Web of Science ID：WOS:000490354600011
• Low magnetic field effects on triplet pair annihilations at canonical orientations　　　　　　　　　　　　　　　
  Yago, T.
  Journal of Chemical Physics, Volume：151, Number：21, 2019, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1063/1.5127904
  DOI ID：10.1063/1.5127904, ISSN：1089-7690, ORCID：89742198, SCOPUS ID：85076375861, Web of Science ID：WOS:000504066300025
• Exploring the Structure of an Exchange-Coupled Triplet Pair Generated by Singlet Fission in Crystalline Diphenylhexatriene: Anisotropic Magnetic Field Effects on Fluorescence in High Fields　　　　　　　　　　　　　　　
  Ishikawa, K.; Yago, T.; Wakasa, M.
  Journal of Physical Chemistry C, Volume：122, Number：39, First page：22264, Last page：22272, Oct. 2018, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.8b06026
  DOI ID：10.1021/acs.jpcc.8b06026, ISSN：1932-7455, ORCID：89742166, SCOPUS ID：85053924092, Web of Science ID：WOS:000446926400005
• Structure and dynamics of triplet-exciton pairs generated from singlet fission studied via magnetic field effects　　　　　　　　　　　　　　　
  Wakasa, M.; Yago, T.; Sonoda, Y.; Katoh, R.
  Communications Chemistry, Volume：1, Number：1, Mar. 2018, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1038/s42004-018-0008-0
  DOI ID：10.1038/s42004-018-0008-0, ISSN：2399-3669, ORCID：89742170, SCOPUS ID：85050869853, Web of Science ID：WOS:000433892800001
• A spin exchange model for singlet fission　　　　　　　　　　　　　　　
  Tomoaki Yago; Masanobu Wakasa
  Chemical Physics Letters, Volume：695, First page：240, Last page：244, Mar. 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.cplett.2018.02.025
  DOI ID：10.1016/j.cplett.2018.02.025, ISSN：0009-2614, SCOPUS ID：85042088892, Web of Science ID：WOS:000427386500038
• Singlet Fission in Fluorinated Diphenylhexatrienes　　　　　　　　　　　　　　　
  Ryuzi Katoh; Masaaki Hashimoto; Akinori Takahashi; Yoriko Sonoda; Tomoaki Yago; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：121, Number：46, First page：25666, Last page：25671, Nov. 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.7b06905
  DOI ID：10.1021/acs.jpcc.7b06905, ISSN：1932-7447, Web of Science ID：WOS:000416496200007
• Magnetic Field Effects on Triplet Pair Generated by Singlet Fission in an Organic Crystal: Application of Radical Pair Model to Triplet Pair　　　　　　　　　　　　　　　
  Tomoaki Yago; Kei Ishikawa; Ryuzi Katoh; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：120, Number：49, First page：27858, Last page：27870, Dec. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.6b09570
  DOI ID：10.1021/acs.jpcc.6b09570, ISSN：1932-7447, Web of Science ID：WOS:000390072100014
• Photocyclization Reactions of Diarylethenes via the Excited Triplet State　　　　　　　　　　　　　　　
  Ryutaro Murata; Tomoaki Yago; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY A, Volume：119, Number：45, First page：11138, Last page：11145, Nov. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpca.5b08205
  DOI ID：10.1021/acs.jpca.5b08205, ISSN：1089-5639, Web of Science ID：WOS:000364435300012
• What Can Be Learned from Magnetic Field Effects on Singlet Fission: Role of Exchange Interaction in Excited Triplet Pairs　　　　　　　　　　　　　　　
  Masanobu Wakasa; Mana Kaise; Tomoaki Yago; Ryuzi Katoh; Yusuke Wakikawa; Tadaaki Ikoma
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：119, Number：46, First page：25840, Last page：25844, Nov. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.5b10176
  DOI ID：10.1021/acs.jpcc.5b10176, ISSN：1932-7447, Web of Science ID：WOS:000365463000018
• Time-Resolved Detection of Magnetic Field Effects on Radical Pairs in Micelles: Two-Step Two-Laser Fluorescence Spectroscopy of Transient Radicals　　　　　　　　　　　　　　　
  Tomoaki Yago; Ayuto Takashino; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：119, Number：34, First page：20217, Last page：20223, Aug. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.5b07524
  DOI ID：10.1021/acs.jpcc.5b07524, ISSN：1932-7447, Web of Science ID：WOS:000360415700078
• Erratum: A practical approach to calculate the time evolutions of magnetic field effects on photochemical reactions in nano-structured materials(Phys. Chem. Chem. Phys. (2015) 10.1039/c5cp00595g)　　　　　　　　　　　　　　　
  Tomoaki Yago; Masanobu Wakasa
  Physical Chemistry Chemical Physics, Volume：17, Number：18, First page：12366, May 2015, [Reviewed]
  Royal Society of Chemistry, English, Scientific journal
  DOI：https://doi.org/10.1039/c5cp90061a
  DOI ID：10.1039/c5cp90061a, ISSN：1463-9076, SCOPUS ID：84928902428
• A practical approach to calculate the time evolutions of magnetic field effects on photochemical reactions in nano-structured materials　　　　　　　　　　　　　　　
  Tomoaki Yago; Masanobu Wakasa
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：17, Number：15, First page：9737, Last page：9747, 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1039/c5cp00595g
  DOI ID：10.1039/c5cp00595g, ISSN：1463-9076, eISSN：1463-9084, Web of Science ID：WOS:000352270700017
• Diffusion and Solvation of Radical Ions in an Ionic Liquid Studied by the MFE Probe　　　　　　　　　　　　　　　
  Tomoaki Yago; Yuya Ishii; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：118, Number：38, First page：22356, Last page：22367, Sep. 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp5069544
  DOI ID：10.1021/jp5069544, ISSN：1932-7447, Web of Science ID：WOS:000342396300069
• Local structure of ionic liquids probed by self-quenching of thiobenzophenone　　　　　　　　　　　　　　　
  Miyuki Tanaka; Tomoaki Yago; Masanobu Wakasa
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：15, Number：3, First page：787, Last page：794, 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1039/c2cp42766d
  DOI ID：10.1039/c2cp42766d, ISSN：1463-9076, Web of Science ID：WOS:000312217200008
• Cage lifetimes of ionic liquids as studied by the magnetic field effect probe　　　　　　　　　　　　　　　
  Tomohide Okada; Tomoaki Yago; Tadashi Takamasu; Masanobu Wakasa
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：14, Number：10, First page：3490, Last page：3497, 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1039/c2cp23747d
  DOI ID：10.1039/c2cp23747d, ISSN：1463-9076, eISSN：1463-9084, Web of Science ID：WOS:000300314100026
• Cyclization Reaction of Diarylethene through the Triplet Excited State　　　　　　　　　　　　　　　
  Ryutaro Murata; Tomoaki Yago; Masanobu Wakasa
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：84, Number：12, First page：1336, Last page：1338, Dec. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/bcsj.20110212
  DOI ID：10.1246/bcsj.20110212, ISSN：0009-2673, eISSN：1348-0634, Web of Science ID：WOS:000298906900005
• Magnetic Field Effects on Photochemical Reactions in Ionic Liquids with Short Alkyl Chains　　　　　　　　　　　　　　　
  Tomoaki Yago; Atom Hamasaki; Miyuki Tanaka; Tadashi Takamasu; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：115, Number：43, First page：21063, Last page：21071, Nov. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp207816t
  DOI ID：10.1021/jp207816t, ISSN：1932-7447, Web of Science ID：WOS:000296172800033
• Magnetic Field Effects on Hydrogen Abstraction of Thiobenzophenone as a Probe of Microviscosity　　　　　　　　　　　　　　　
  Miyuki Tanaka; Tomoaki Yago; Yoshio Sakaguchi; Tadashi Takamasu; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：115, Number：9, First page：1936, Last page：1943, Mar. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp108898a
  DOI ID：10.1021/jp108898a, ISSN：1520-6106, Web of Science ID：WOS:000287833000002
• Nanoscale Structure of Ionic Liquid and Diffusion Process as Studied by the MFE Probe　　　　　　　　　　　　　　　
  Tomoaki Yago; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：115, Number：6, First page：2673, Last page：2678, Feb. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp1108762
  DOI ID：10.1021/jp1108762, ISSN：1932-7447, Web of Science ID：WOS:000287065700010
• Magnetic Field Effects on Photochemical Reaction in Mesoporous Silicates of MCM-41 under High Magnetic Fields up to 5 T　　　　　　　　　　　　　　　
  Tomoaki Maeyama; Hiroki Matsui; Tomoaki Yago; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY C, Volume：114, Number：50, First page：22190, Last page：22196, Dec. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp107729s
  DOI ID：10.1021/jp107729s, ISSN：1932-7447, Web of Science ID：WOS:000285236800042
• Quantum Oscillations and Polarization of Nuclear Spins in Photoexcited Triplet States　　　　　　　　　　　　　　　
  Gerd Kothe; Tomoaki Yago; Jorg-Ulrich Weidner; Gerhard Link; Michail Lukaschek; Tien-Sung Lin
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：114, Number：45, First page：14755, Last page：14762, Nov. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp103508t
  DOI ID：10.1021/jp103508t, ISSN：1520-6106, Web of Science ID：WOS:000284018000078
• Hydrogen Bonding Effects on the Reorganization Energy for Photoinduced Charge Separation Reaction between Porphyrin and Quinone Studied by Nanosecond Laser Flash Photolysis　　　　　　　　　　　　　　　
  Tomoaki Yago; Masao Gohdo; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：114, Number：7, First page：2476, Last page：2483, Feb. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp909927w
  DOI ID：10.1021/jp909927w, ISSN：1520-6106, Web of Science ID：WOS:000274578500019
• Primary Photochemical Process of Thiobenzophenone as Studied by Laser Flash Photolysis　　　　　　　　　　　　　　　
  Miyuki Tanaka; Tomoaki Yago; Masanobu Wakasa
  CHEMISTRY LETTERS, Volume：38, Number：11, First page：1086, Last page：1087, Nov. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/cl.2009.1086
  DOI ID：10.1246/cl.2009.1086, ISSN：0366-7022, eISSN：1348-0715, Web of Science ID：WOS:000272854200037
• Ethanol Concentration Dependence of Photoinduced Charge Separation Reaction between Zinc Tetraphenylporphyrin and Duroquinone Studied by Laser Flash Photolysis　　　　　　　　　　　　　　　
  Tomoaki Yago; Masao Gohdo; Masanobu Wakasa
  CHEMISTRY LETTERS, Volume：38, Number：9, First page：880, Last page：881, Sep. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/cl.2009.880
  DOI ID：10.1246/cl.2009.880, ISSN：0366-7022, eISSN：1348-0715, Web of Science ID：WOS:000270590500004
• Nanoscale Heterogeneous Structure of Ionic Liquid as Revealed by Magnetic Field Effects　　　　　　　　　　　　　　　
  Masanobu Wakasa; Tomoaki Yago; Atom Hamasaki
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：113, Number：31, First page：10559, Last page：10561, Aug. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp905543k
  DOI ID：10.1021/jp905543k, ISSN：1520-6106, Web of Science ID：WOS:000268479000004
• Magnetic Field Effect on a Radical Pair Reaction as a Probe of Microviscosity　　　　　　　　　　　　　　　
  Atom Hamasaki; Tomoaki Yago; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：112, Number：45, First page：14185, Last page：14192, Nov. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp804862w
  DOI ID：10.1021/jp804862w, ISSN：1520-6106, CiNii Articles ID：80019963904, PubMed ID：18939791, SCOPUS ID：57049142078, Web of Science ID：WOS:000260675800013
• Formation process of micrometer-sized pseudoisocyanine J-aggregates studied by single-aggregate fluorescence spectroscopy　　　　　　　　　　　　　　　
  Yasutaka Kitahama; Tomoaki Yago; Akihiro Furube; Ryuzi Katoh
  CHEMICAL PHYSICS LETTERS, Volume：457, Number：4-6, First page：427, Last page：433, May 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.cplett.2008.04.021
  DOI ID：10.1016/j.cplett.2008.04.021, ISSN：0009-2614, eISSN：1873-4448, Web of Science ID：WOS:000255953800030
• Anomalous magnetic field effects on photochemical reactions in ionic liquid under ultrahigh fields of up to 28 T　　　　　　　　　　　　　　　
  Atom Hamasaki; Tomoaki Yago; Tadashi Takamasu; Giyuu Kido; Masanobu Wakasa
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：112, Number：11, First page：3375, Last page：3379, Mar. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp710047c
  DOI ID：10.1021/jp710047c, ISSN：1520-6106, CiNii Articles ID：80019421159, PubMed ID：18298111, SCOPUS ID：46749112239, Web of Science ID：WOS:000253945900016
• Imaging of exciton absorption in perylene crystals by femtosecond-laser scanning microscopy　　　　　　　　　　　　　　　
  Tomoaki Yago; Yoshiaki Tamaki; Akihiro Furube; Ryuzi Katoh
  JAPANESE JOURNAL OF APPLIED PHYSICS, Volume：47, Number：2, First page：1400, Last page：1403, Feb. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1143/JJAP.47.1400
  DOI ID：10.1143/JJAP.47.1400, ISSN：0021-4922, CiNii Articles ID：150000050047, SCOPUS ID：54249148973, Web of Science ID：WOS:000255020000055
• Self-trapping limited exciton diffusion in a monomeric perylene crystal as revealed by femtosecond transient absorption microscopy　　　　　　　　　　　　　　　
  Tomoaki Yago; Yoshiaki Tamaki; Akihiro Furube; Ryuzi Katoh
  PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Volume：10, Number：30, First page：4435, Last page：4441, 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1039/b801856a
  DOI ID：10.1039/b801856a, ISSN：1463-9076, Web of Science ID：WOS:000257889600010
• Pulsed electron nuclear double resonance studies of the photoexcited triplet state of pentacene in p-terphenyl crystals at room temperature　　　　　　　　　　　　　　　
  Tomoaki Yago; Gerhard Link; Gerd Kothe; Tien-Sung Lin
  JOURNAL OF CHEMICAL PHYSICS, Volume：127, Number：11, Sep. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1063/1.2771145
  DOI ID：10.1063/1.2771145, ISSN：0021-9606, Web of Science ID：WOS:000249667400038
• Quantum oscillations in photo-excited triplet states in an external magnetic field　　　　　　　　　　　　　　　
  Tomoaki Yago; Joerg-Ulrich Weidner; Gerhard Link; Tien-Sung Lin; Gerd Kothe
  CHEMICAL PHYSICS LETTERS, Volume：438, Number：4-6, First page：351, Last page：357, Apr. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.cplett.2007.03.031
  DOI ID：10.1016/j.cplett.2007.03.031, ISSN：0009-2614, Web of Science ID：WOS:000246060000039
• Growth of beta-perylene crystal　　　　　　　　　　　　　　　
  Tomoaki Yago; Yoshiaki Tamaki; Akihiro Furube; Ryuzi Katoh
  CHEMISTRY LETTERS, Volume：36, Number：3, First page：370, Last page：371, Mar. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/cl.2007.370
  DOI ID：10.1246/cl.2007.370, ISSN：0366-7022, eISSN：1348-0715, Web of Science ID：WOS:000246058000010
• Structural organization in photosynthetic proteins as studied by high-field EPR of spin-correlated radical pair states　　　　　　　　　　　　　　　
  G Link; OG Poluektov; LM Utschig; J Lalevee; T Yago; JU Weidner; MC Thurnauer; G Kothe
  MAGNETIC RESONANCE IN CHEMISTRY, Volume：43, First page：S103, Last page：S109, Nov. 2005, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1002/mrc.1678
  DOI ID：10.1002/mrc.1678, ISSN：0749-1581, eISSN：1097-458X, PubMed ID：16235208, SCOPUS ID：27644590846, Web of Science ID：WOS:000233024800013
• Correlation field splitting of intramolecular vibrations of crystalline tetracene in terahertz region　　　　　　　　　　　　　　　
  T Yago; Y Ishikawa; H Ito; H Tanaka; E Kwon; K Sakamoto; K Suto; M Watanabe; J Nishizawa
  JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, Volume：44, Number：6A, First page：4145, Last page：4150, Jun. 2005, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1143/JJAP.44.4145
  DOI ID：10.1143/JJAP.44.4145, ISSN：0021-4922, SCOPUS ID：23944445266, Web of Science ID：WOS:000230126000102
• Aspects of the electron transfer reaction rate for systems accompanying a chemical equilibrium change　　　　　　　　　　　　　　　
  T Yago; Y Kobori; K Akiyama; S Tero-Kubota
  BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, Volume：77, Number：11, First page：1997, Last page：2001, Nov. 2004, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1246/bcsj.77.1997
  DOI ID：10.1246/bcsj.77.1997, ISSN：0009-2673, eISSN：1348-0634, SCOPUS ID：9744268198, Web of Science ID：WOS:000225482300004
• Superexchange electron tunneling mediated by solvent molecules: Pulsed electron paramagnetic resonance study on electronic coupling in solvent-separated radical ion pairs　　　　　　　　　　　　　　　
  Y Kobori; T Yago; K Akiyama; S Tero-Kubota; H Sato; F Hirata; Norris, JR
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：108, Number：29, First page：10226, Last page：10240, Jul. 2004, [Reviewed]
  English
  DOI：https://doi.org/10.1021/jp036925t
  DOI ID：10.1021/jp036925t, ISSN：1520-6106, SCOPUS ID：3442901077, Web of Science ID：WOS:000222763000004
• Control of the sign of exchange interactions in solvent-separated radical ion pairs　　　　　　　　　　　　　　　
  S Tero-Kubota; K Zikihara; T Yago; Y Kobori; K Akiyama
  APPLIED MAGNETIC RESONANCE, Volume：26, Number：1-2, First page：145, Last page：154, 2004, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/BF03166568
  DOI ID：10.1007/BF03166568, ISSN：0937-9347, eISSN：1613-7507, SCOPUS ID：3042701871, Web of Science ID：WOS:000222366000011
• Reorganization energy induced by noncovalent bonding interaction in electron transfer reactions　　　　　　　　　　　　　　　
  T Yago; Y Kobori; K Akiyama; S Tero-Kubota
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：107, Number：48, First page：13255, Last page：13257, Dec. 2003, [Reviewed]
  English
  DOI：https://doi.org/10.1021/jp035494b
  DOI ID：10.1021/jp035494b, ISSN：1520-6106, SCOPUS ID：0346947219, Web of Science ID：WOS:000186878000002
• Time-resolved EPR study on reorganization energies for charge recombination reactions in the systems involving hydrogen bonding　　　　　　　　　　　　　　　
  T Yago; Y Kobori; K Akiyama; S Tero-Kubota
  CHEMICAL PHYSICS LETTERS, Volume：369, Number：1-2, First page：49, Last page：54, Feb. 2003, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/S0009-2614(02)01963-2
  DOI ID：10.1016/S0009-2614(02)01963-2, ISSN：0009-2614, SCOPUS ID：0037422855, Web of Science ID：WOS:000180795200007
• Diffusion-model analysis of effective CIDEP distance in solvent-separated radical-ion pair　　　　　　　　　　　　　　　
  Y Kobori; T Yago; S Tero-Kubota
  APPLIED MAGNETIC RESONANCE, Volume：23, Number：3-4, First page：269, Last page：287, 2003, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/BF03166621
  DOI ID：10.1007/BF03166621, ISSN：0937-9347, eISSN：1613-7507, SCOPUS ID：0037266438, Web of Science ID：WOS:000182097000003
• Time-resolved EPR study on reorganization energies for charge recombination processes in nanometer-separated radical ion pairs　　　　　　　　　　　　　　　
  T Yago; Y Kobori; K Akiyama; S Tero-Kubota
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：106, Number：39, First page：10074, Last page：10081, Oct. 2002, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/jp021119s
  DOI ID：10.1021/jp021119s, ISSN：1520-6106, Web of Science ID：WOS:000178273500014
• Determination of electron-transfer reorganization energy in nanometer-separated radical ion pair by time-resolved EPR spectroscopy　　　　　　　　　　　　　　　
  Y Kobori; T Yago; K Akiyama; S Tero-Kubota
  JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Volume：123, Number：39, First page：9722, Last page：9723, Oct. 2001, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/ja015752n
  DOI ID：10.1021/ja015752n, ISSN：0002-7863, PubMed ID：11572713, SCOPUS ID：0035802367, Web of Science ID：WOS:000171407800045

• 有機固体中で生じる反応活性種のスピン状態のピコ秒検出　　　　　　　　　　　　　　　
  矢後友暁
  総合研究機構研究プロジェクト研究成果報告書, Volume：第6号(平成19年度), 2008

• 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
• ナノ構造体での励起子分裂および励起子融合の機構解明とその制御　　　　　　　　　　　　　　　
  01 Apr. 2020 - 31 Mar. 2023
  Grant amount(Total)：4420000, Direct funding：3400000, Indirect funding：1020000
  Grant number：20K05416
• スピン化学の手法を用いた励起子融合の詳細なメカニズム解明および新規材料開発　　　　　　　　　　　　　　　
  01 Apr. 2019 - 31 Mar. 2022
  Grant amount(Total)：17680000, Direct funding：13600000, Indirect funding：4080000
  Grant number：19H02670
• Universal and Specific Features of Geminate Delayed Fluorescence by Triplet Fusion　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 01 Apr. 2019 - 31 Mar. 2022
  Seki Kazuhiko, National Institute of Advanced Industrial Science and Technology
  Grant amount(Total)：4420000, Direct funding：3400000, Indirect funding：1020000
  Singlet fission (SF) is a photochemical process, which generates two triplets from a singlet exciton. Its reverse process is termed triplet fusion (TF). When TF occurs between the same geminate triplet-pair generated by SF, delayed fluorescence by geminate fusion might occur when TF between geminate pair involves diffusional encounter. The delayed fluorescence after pulsed excitation decays by power law. In 1,2, and 3 dimensions, the exponent is -3/2, -1 (apart from logarithmic dependence), and -3/2, respectively. The exponent of the power law decay reflects the diffusional anisotropy. Theoretically, the exponent of the power law decay may change from -1 of 2 dimensions to -3/2 of 3 dimensions as time proceed for certain values of the anisotropy ratio in the triplet diffusion constants but the diffusion should be highly anisotropic (1000 times different) to obtain such cross-over. The theoretical results are compared to the measured fluorescence decay in tetracene and rubrene.
  Grant number：19K05395
• Structural Analysis on Short-Lived Triplet Pairs Generated by Singlet Fission　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), 01 Apr. 2017 - 31 Mar. 2021
  Yago Tomoaki, Saitama University
  Grant amount(Total)：4940000, Direct funding：3800000, Indirect funding：1140000
  Triplet pairs are generated by singlet fission in organic solids. Triple pairs are important intermediate to determine the efficiency of singlet fission. However nature of the triplet pair states has not been clarified due to the short lifetime of triplet pairs. The magnetic field effects on delayed fluorescence are often observed after singlet fission and triplet fusion. We have measured magnetic field dependence of the intensity of delayed fluorescence with several organic crystals. We determined the structure of a triplet pair generated by singlet fission. The structure of triplet pair for efficient singlet fission were discussed on the basis of the magnetic field dependence of the delayed fluorescence.
  Grant number：17K05742
• Study of Magnetic Field Effects on Singlet Fission　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 01 Apr. 2016 - 31 Mar. 2019
  WAKASA Masanobu, Saitama University
  Grant amount(Total)：17420000, Direct funding：13400000, Indirect funding：4020000
  Magnetic field effects (MFEs) on triplet pair generated by singlet fission (SF) in an organic crystal, 1,6-diphenyl-1,3,5-hexatriene, were studied by steady-state fluorescence measurements under ultra-high magnetic fields of up to 30 T and by time-resolved fluorescence measurements with sub-nanosecond time resolution. The observed MFEs were analyzed by using stochastic Liouville equation based on the radical pair (RP) model. The excellent agreements between the observed and simulated MFEs demonstrate that the RP model can apply to the analysis of the MFE on triplet pair with a modification of the spin Hamiltonian.
  Grant number：16H04093
• Development of a new spin probe method using the visible laser pulse　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (B), 01 Apr. 2013 - 31 Mar. 2015
  YAGO Tomoaki, Saitama University
  Grant amount(Total)：4160000, Direct funding：3200000, Indirect funding：960000
  Time-resolved Faraday rotation measurements were performed using photo-excited state of organic molecules. In ionic liquids, the spin system where the two unpaired electron spins are strongly correlated were observed by using the nano-second laser flash photolysis with the combination of the magnetic field. By the application of Miller-Guy method, the analysis of the stochastic Liouville equations was modified to calculate the time evolution of the complex spin system. Electron spin resonance measurements could not be performed due to the trouble of the spectrometer.
  Grant number：25870123
• Reaction Dynamics in Nano-space as Studied by Time-resolved　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2010 - 2012
  WAKASA Masanobu; YAGO Tomoaki, Saitama University
  Grant amount(Total)：20410000, Direct funding：15700000, Indirect funding：4710000
  560 GHz time-resolved high-frequency ESR was developed by using30 tesla pulsed magnet and THz light source. Moreover,inhomogeneous nano-space was studied by the magnetic field effect (MFE) probe. In mesoporous silica MCM-41, increases of micro-viscosity were observed by formation of partially clusterization of solvent. In the case of ionic liquids, inhomogeneous structure, which lifetimes were 20-120 ns,was generated in spite of a liquid.
  Grant number：22350003
• Construction of time-resolved Faraday rotation measurement system and its application to the organic spin polarized materials.　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (B), 2009 - 2010
  YAGO Tomoaki, Saitama University
  Grant amount(Total)：4420000, Direct funding：3400000, Indirect funding：1020000
  The purpose of the present study is generation and detection of the large magnetization in organic materials by employing the photo-excited triplet states of organic molecule. Time-resolved Faraday rotation measurement system has been developed by using the lasers, polarizers, and amplifiers. Also the magnetic resonance study on the photo-excited triplet state was performed in Prof. Lin's laboratory at Washington University in St. Louis, collaborating with Prof. Lin and Prof. Kothe from Freiburg University in Germany. Theoretical analysis revealed that the large spin polarizations are generated in the level-crossing region of the triplet state.
  Grant number：21750009
• Development of pico-second spin detection instrument using the photo-excited triplet state　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (Start-up), 2007 - 2008
  YAGO Tomoaki, Saitama University
  Grant amount(Total)：3034000, Direct funding：2650000, Indirect funding：384000
  Grant number：19850004
• -　　　　　　　　　　　　　　　
  Competitive research funding
• -　　　　　　　　　　　　　　　
  Competitive research funding