Performance information

• Effect of frequency chirp on RYDMR spectrum in AWG-RYDMR system at low magnetic field　　　　　　　　　　　　　　　
  Akihiro Tateno; Hiroki Nagashima; Kiminori Maeda
  Chemical Physics Letters, Apr. 2025, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.1016/j.cplett.2025.141905
  DOI ID：10.1016/j.cplett.2025.141905, ORCID：176224456
• Anisotropic and Coherent Control of Radical Pairs by Optimized RF Fields　　　　　　　　　　　　　　　
  Akihiro Tateno; Kenta Masuzawa; Hiroki Nagashima; Kiminori Maeda
  International Journal of Molecular Sciences, Jun. 2023, [Reviewed]
  Scientific journal
  DOI：https://doi.org/10.3390/ijms24119700
  DOI ID：10.3390/ijms24119700, ORCID：136332548
• Synergetic Role of Conformational Flexibility and Electronic Coupling for Quantitative Intramolecular Singlet Fission　　　　　　　　　　　　　　　
  Shunta Nakamura; Hayato Sakai; Hiroki Nagashima; Masaaki Fuki; Kakeru Onishi; Ramsha Khan; Yasuhiro Kobori; Nikolai V. Tkachenko; Taku Hasobe
  The Journal of Physical Chemistry C, Volume：125, Number：33, First page：18287, Last page：18296, Aug. 2021, [Reviewed]
  American Chemical Society ({ACS}), Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.1c04734
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85114009615&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85114009615&origin=inward
  DOI ID：10.1021/acs.jpcc.1c04734, ISSN：1932-7447, eISSN：1932-7455, ORCID：98448849, SCOPUS ID：85114009615
• Ultra‐Narrow Depletion Layers in a Hematite Mesocrystal‐Based Photoanode for Boosting Multihole Water Oxidation　　　　　　　　　　　　　　　
  Zhujun Zhang; Hiroki Nagashima; Takashi Tachikawa
  Angewandte Chemie International Edition, Volume：59, Number：23, First page：9047, Last page：9054, Jun. 2020, [Reviewed]
  Wiley
  DOI：https://doi.org/10.1002/anie.202001919
  DOI ID：10.1002/anie.202001919, PubMed ID：32173995
• Spin Dynamics of Quintet and Triplet States Resulting from Singlet Fission in Oriented Terrylenediimide and Quaterrylenediimide Films　　　　　　　　　　　　　　　
  Youn Jue Bae; Xingang Zhao; Matthew D. Kryzaniak; Hiroki Nagashima; Joseph Strzalka; Qingteng Zhang; Michael R. Wasielewski
  The Journal of Physical Chemistry C, Volume：124, Number：18, First page：9822, Last page：9833, May 2020, [Reviewed]
  American Chemical Society ({ACS}), Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.0c03189
  DOI ID：10.1021/acs.jpcc.0c03189, ORCID：72772604
• Orientation of Ligand Field for Dangling Manganese in Photosynthetic Oxygen-Evolving Complex of Photosystem II　　　　　　　　　　　　　　　
  Hiroyuki Mino; Hiroki Nagashima
  The Journal of Physical Chemistry B, Volume：124, Number：1, First page：128, Last page：133, Jan. 2020, [Reviewed]
  American Chemical Society ({ACS}), Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcb.9b10817
  DOI ID：10.1021/acs.jpcb.9b10817, ORCID：66440085
• Interfacial oxygen vacancies yielding long-lived holes in hematite mesocrystal-based photoanodes　　　　　　　　　　　　　　　
  Zhujun Zhang; Izuru Karimata; Hiroki Nagashima; Shunsuke Muto; Koji Ohara; Kunihisa Sugimoto; Takashi Tachikawa
  NATURE COMMUNICATIONS, Volume：10, Oct. 2019, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1038/s41467-019-12581-z
  DOI ID：10.1038/s41467-019-12581-z, ISSN：2041-1723, Web of Science ID：WOS:000491858200021
• Controlled Orientations of Neighboring Tetracene Units by Mixed Self-Assembled Monolayers on Gold Nanoclusters for High-Yield and Long-Lived Triplet Excited States through Singlet Fission　　　　　　　　　　　　　　　
  Toshiyuki Saegusa; Hayato Sakai; Hiroki Nagashima; Yasuhiro Kobori; Nikolai V. Tkachenko; Taku Hasobe
  Journal of the American Chemical Society, Volume：141, Number：37, First page：14720, Last page：14727, Sep. 2019, [Reviewed]
  American Chemical Society ({ACS}), Scientific journal
  DOI：https://doi.org/10.1021/jacs.9b06567
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85072270985&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85072270985&origin=inward
  DOI ID：10.1021/jacs.9b06567, ISSN：0002-7863, eISSN：1520-5126, ORCID：61325979, PubMed ID：31529955, SCOPUS ID：85072270985
• Long-lived Triplet Excitons Formed by Exergonic Intramolecular Singlet Fission of an Adamantane-linked Tetracene Dyad
  Yasunori Matsui; Shuhei Kawaoka; Hiroki Nagashima; Tatsuo Nakagawa; Naoki Okamura; Takuya Ogaki; Eisuke Ohta; Seiji Akimoto; Shigeyuki Yagi; Yasuhiro Kobori; Hiroshi Ikeda
  Mar. 2019
  American Chemical Society ({ACS})
  DOI：https://doi.org/10.26434/chemrxiv.7808435.v1
  DOI ID：10.26434/chemrxiv.7808435.v1, ORCID：55047389
• Quantitative Sequential Photoenergy Conversion Process from Singlet Fission to Intermolecular Two-Electron Transfers Utilizing Tetracene Dimer
  Shunta Nakamura; Hayato Sakai; Hiroki Nagashima; Yasuhiro Kobori; Nikolai V. Tkachenko; Taku Hasobe
  ACS Energy Letters, Volume：4, Number：1, First page：26, Last page：31, Nov. 2018, [Reviewed]
  American Chemical Society ({ACS}), English, Scientific journal
  DOI：https://doi.org/10.1021/acsenergylett.8b01964
  DOI ID：10.1021/acsenergylett.8b01964, ISSN：2380-8195, eISSN：2380-8195, ORCID：51118023
• Synthesis, Structure and Electronic Properties of Graphitic Carbon Nitride Films
  Hiroki Nagashima
  The journal of physical chemistry C, Oct. 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcc.8b07972
  DOI ID：10.1021/acs.jpcc.8b07972, ORCID：49885004
• Identifying triplet pathways in dilute pentacene films　　　　　　　　　　　　　　　
  Daphné Lubert-Perquel; Enrico Salvadori; Matthew Dyson; Paul N. Stavrinou; Riccardo Montis; Hiroki Nagashima; Yasuhiro Kobori; Sandrine Heutz; Christopher; W.M. Kay
  Nature Communications, Volume：9, Number：1, First page：4222, Last page：4222, Oct. 2018, [Reviewed], ［International magazine］
  Building efficient triplet-harvesting layers for photovoltaic applications requires a deep understanding of the microscopic properties of the components involved and their dynamics. Singlet fission is a particularly appealing mechanism as it generates two excitons from a single photon. However, the pathways of the coupled triplets into free species, and their dependence on the intermolecular geometry, has not been fully explored. In this work, we produce highly ordered dilute pentacene films with distinct parallel and herringbone dimers and aggregates. Using electron paramagnetic resonance spectroscopy, we provide compelling evidence for the formation of distinct quintet excitons in ambient conditions, with intrinsically distinctive electronic and kinetic properties. We find that the ability of quintets to separate into free triplets is promoted in the parallel dimers and this provides molecular design rules to control the triplets, favouring either enhanced photovoltaic efficiency (parallel) or strongly bound pairs that could be exploited for logic applications (herringbone).
  English, Scientific journal
  DOI：https://doi.org/10.1038/s41467-018-06330-x
  DOI ID：10.1038/s41467-018-06330-x, ORCID：49011922, PubMed ID：30310077, PubMed Central ID：PMC6181988
• Singlet-Fission-Born Quintet State: Sublevel Selections and Trapping by Multiexciton Thermodynamics　　　　　　　　　　　　　　　
  Nagashima, Hiroki; Kawaoka, Shuhei; Akimoto, Seiji; Tachikawa, Takashi; Matsui, Yasunori; Ikeda, Hiroshi; Kobori, Yasuhiro
  The journal of physical chemistry letters, Volume：9, First page：5855, Last page：5861, Sep. 2018, [Reviewed]
  ACS Publications, English, Scientific journal
  ORCID：48687389
• Multiexciton Dynamics Depending on Intramolecular Orientations in Pentacene Dimers: Recombination and Dissociation of Correlated Triplet Pairs
  Hayato Sakai; Ryutaro Inaya; Hiroki Nagashima; Shunta Nakamura; Yasuhiro Kobori; Nikolai V. Tkachenko; Taku Hasobe
  Journal of Physical Chemistry Letters, Volume：9, Number：12, First page：3354, Last page：3360, Jun. 2018, [Reviewed]
  American Chemical Society, English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpclett.8b01184
  DOI ID：10.1021/acs.jpclett.8b01184, ISSN：1948-7185, ORCID：45425927, SCOPUS ID：85048051622
• Local Structural Modification of Ca2+-Depleted Photosystem II Detected by Proton Matrix ENDOR
  Hiroki Nagashima; Hiroyuki Mino
  Applied Magnetic Resonance, Volume：49, Number：8, First page：1, Last page：10, Apr. 2018, [Reviewed]
  Springer-Verlag Wien, English, Scientific journal
  DOI：https://doi.org/10.1007/s00723-018-1006-1
  DOI ID：10.1007/s00723-018-1006-1, ISSN：0937-9347, ORCID：44570356, SCOPUS ID：85046032094
• Time-Resolved EPR Study on Singlet-Fission Induced Quintet Generation and Subsequent Triplet Dissociation in TIPS-Phenyl-Tetracene Aggregates　　　　　　　　　　　　　　　
  Hiroki Nagashima; Shuhei Kawaoka; Yasunori Matsui; Takashi Tachikawa; Hiroshi Ikeda; Yasuhiro Kobori
  JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY, Volume：31, Number：2, First page：163, Last page：167, 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2494/photopolymer.31.163
  DOI ID：10.2494/photopolymer.31.163, ISSN：0914-9244, ORCID：48141756, Web of Science ID：WOS:000440124400004
• Multiple Quintets via Singlet Fission in Ordered Films at Room Temperature　　　　　　　　　　　　　　　
  Lubert-Perquel; Daphn{\'e; Salvadori, Enrico; Dyson, Matthew; Stavrinou; Paul N.; Montis, Riccardo; Nagashima, Hiroki; Kobori, Yasuhiro; Heutz, Sandrine; d Kay; Christopher WM
  arXiv preprint arXiv:1801.00603, 2018, [Reviewed]
  Scientific journal
  ORCID：42527264
• Magnetic structure of manganese cluster in photosystem II investigated by electron paramagnetic resonance　　　　　　　　　　　　　　　
  Nagashima, Hiroki; Asada, Mizue; Mino, Hiroyuki
  Biophysics and Physicobiology, Volume：15, First page：45, Last page：50, 2018, [Reviewed]
  The Biophysical Society of Japan, Scientific journal
  ORCID：42527056
• Dimeric Structure of the Blue Light Sensor Protein Photozipper in the Active State　　　　　　　　　　　　　　　
  Ozeki, Kohei; Tsukuno, Hiroyuki; Nagashima, Hiroki; Hisatomi, Osamu; Mino, Hiroyuki
  Biochemistry, Volume：57, Number：5, First page：494, Last page：497, Dec. 2017, [Reviewed]
  ACS Publications, English, Scientific journal
  ORCID：42527027
• Regulated Electron Tunneling of Photoinduced Primary Charge Separated State in the Photosystem II Reaction Center　　　　　　　　　　　　　　　
  Masashi Hasegawa; Hiroki Nagashima; Reina Minobe; Takashi Tachikawa; Hiroyuki Mino; Yasuhiro Kobori
  JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Volume：8, Number：6, First page：1179, Last page：1184, Mar. 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpclett.7b00044
  DOI ID：10.1021/acs.jpclett.7b00044, ISSN：1948-7185, ORCID：37329641, Web of Science ID：WOS:000396975600014
• Hyperfine Sublevel Correlation Spectroscopy Studies of Iron-Sulfur Cluster in Rieske Protein from Green Sulfur Bacterium Chlorobaculum tepidum　　　　　　　　　　　　　　　
  Hiroki Nagashima; Hiraku Kishimoto; Risa Mutoh; Naotaka Terashima; Hirozo Oh-oka; Genji Kurisu; Hiroyuki Mino
  JOURNAL OF PHYSICAL CHEMISTRY B, Volume：121, Number：12, First page：2543, Last page：2553, Mar. 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpcb.6b12968
  DOI ID：10.1021/acs.jpcb.6b12968, ISSN：1520-6106, ORCID：37329643, Web of Science ID：WOS:000398247700003
• Location of Methanol on the S-2 State Mn Cluster in Photosystem II Studied by Proton Matrix Electron Nuclear Double Resonance　　　　　　　　　　　　　　　
  Hiroki Nagashima; Hiroyuki Mino
  JOURNAL OF PHYSICAL CHEMISTRY LETTERS, Volume：8, Number：3, First page：621, Last page：625, Feb. 2017, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1021/acs.jpclett.7b00110
  DOI ID：10.1021/acs.jpclett.7b00110, ISSN：1948-7185, ORCID：37329645, Web of Science ID：WOS:000393443400014
• ESR 分光法による光化学系 II の酸素発生系 Mn クラスターの構造解析　　　　　　　　　　　　　　　
  浅田瑞枝; 長嶋宏樹; 三野広幸
  生物物理, Volume：57, Number：1, First page：011, Last page：14, 2017, [Reviewed]
  

  Electronic structure of Manganese cluster in photosystem II was investigated by Electron Spin Resonance (ESR) spectroscopy. Spin projections on Mn ions in S₂ state manganese cluster were determined by Pulsed Electron-Electron Double Resonance (PELDOR). Protons surrounded manganese cluster were detected by Electron Nuclear Double Resonance (ENDOR). Based on obtained spin projections, ENDOR signals were assigned to the water molecules ligated to manganese cluster. PELDOR technique was applied to the determination of the high affinity Mn²⁺ site in apo-photosystem II, which is the key site of photo-activation process of manganese cluster.

  
  一般社団法人 日本生物物理学会, Japanese
  DOI：https://doi.org/10.2142/biophys.57.011
  DOI ID：10.2142/biophys.57.011, ISSN：0582-4052, CiNii Articles ID：130005296470, CiNii Books ID：AN00129693, ORCID：37329661
• Proton Matrix ENDOR Studies on Ca2+-depleted and Sr2+-substituted Manganese Cluster in Photosystem II　　　　　　　　　　　　　　　
  Hiroki Nagashinna; Yoshiki Nakajima; Jian-Ren Shen; Hiroyuki Mino
  JOURNAL OF BIOLOGICAL CHEMISTRY, Volume：290, Number：47, First page：28166, Last page：28174, Nov. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1074/jbc.M115.675496
  DOI ID：10.1074/jbc.M115.675496, ISSN：0021-9258, eISSN：1083-351X, ORCID：37329644, Web of Science ID：WOS:000365761900012
• 2P258 ENDOR studies on Ca depleted and Sr substituted Mn cluster in photosystem II(18B. Photobiology:Photosynthesis,Poster)　　　　　　　　　　　　　　　
  Nagashima Hiroki; Nakajima Yoshiki; Shen Jian-Ren; Mino Hiroyuki
  Seibutsu Butsuri, Volume：54, Number：1, First page：S237, 2014
  The Biophysical Society of Japan General Incorporated Association, English
  DOI：https://doi.org/10.2142/biophys.54.S237_6
  DOI ID：10.2142/biophys.54.S237_6, CiNii Articles ID：110009932804
• Highly resolved proton matrix ENDOR of oriented photosystem II membranes in the S-2 state　　　　　　　　　　　　　　　
  Hiroki Nagashima; Hiroyuki Mino
  BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS, Volume：1827, Number：10, First page：1165, Last page：1173, Oct. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.bbabio.2013.06.001
  DOI ID：10.1016/j.bbabio.2013.06.001, ISSN：0005-2728, ORCID：37329646, Web of Science ID：WOS:000323798800004
• Electronic structure of S-2 state of the oxygen-evolving complex of photosystem II studied by PELDOR　　　　　　　　　　　　　　　
  Mizue Asada; Hiroki Nagashima; Faisal Hammad Mekky Koua; Jian-Ren Shen; Asako Kawamori; Hiroyuki Mino
  BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS, Volume：1827, Number：3, First page：438, Last page：445, Mar. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.bbabio.2012.12.011
  DOI ID：10.1016/j.bbabio.2012.12.011, ISSN：0005-2728, eISSN：1879-2650, ORCID：37329642, Web of Science ID：WOS:000315249000023
• 3D0900 Determine the location of protons surrounding Mn cluster of PS II by proton matrix ENDOR using oriented PS II membrane(Photobiology:Photosynthesis,Oral Presentation,The 50th Annual Meeting of the Biophysical Society of Japan)　　　　　　　　　　　　　　　
  Nagashima Hiroki; Mino Hiroyuki
  Seibutsu Butsuri, Volume：52, First page：S61, Last page：S62, 2012
  The Biophysical Society of Japan General Incorporated Association, English
  DOI：https://doi.org/10.2142/biophys.52.S61_6
  DOI ID：10.2142/biophys.52.S61_6, CiNii Articles ID：110009584815
• 3D1022 Determination of magnetic couplings of S_2 state Mn-cluster in Photosystem II studied by PELDOR measurement(Photobiology:Photosynthesis,Oral Presentation,The 50th Annual Meeting of the Biophysical Society of Japan)　　　　　　　　　　　　　　　
  Asada Mizue; Nagashima Hiroki; Koua Faisal Hammad Mekky; Shen Jian-Ren; Mino Hiroyuki
  Seibutsu Butsuri, Volume：52, First page：S63, 2012
  The Biophysical Society of Japan General Incorporated Association, English
  DOI：https://doi.org/10.2142/biophys.52.S63_1
  DOI ID：10.2142/biophys.52.S63_1, CiNii Articles ID：110009584821

• 26aXC-3 Magnetic and Molecular Structure on S_2 state Oxygen Evolving Complex studied by ENDOR　　　　　　　　　　　　　　　
  Mino Hiroyuki; Nagashima Hiroki; Asada Mizue
  Meeting abstracts of the Physical Society of Japan, Volume：68, Number：1, First page：414, Last page：414, 26 Mar. 2013
  The Physical Society of Japan (JPS), Japanese
  ISSN：1342-8349, CiNii Articles ID：110009643924, CiNii Books ID：AA11439205

• ISCA1 の分子間相互作用と, 磁性を担う単核鉄が示す EPR 信号の関係　　　　　　　　　　　　　　　
  長嶋宏樹; 曽我尚吾; 前田公憲; 新井栄揮
  Nov. 2024
  Nov. 2024 - Nov. 2024, Oral presentation
• 低磁場での任意波形による spin mixing の効率向上　　　　　　　　　　　　　　　
  立野明宏; 長嶋宏樹; 前田公憲
  Nov. 2024
  Nov. 2024 - Nov. 2024, Oral presentation
• スーパーキャビティリングダウンによる過渡吸収スペクトルと磁場効果　　　　　　　　　　　　　　　
  福井沙英; 閂綾音; 木村飛翔; 長嶋宏樹; 前田公憲
  Nov. 2024
  Nov. 2024 - Nov. 2024
• Reaction control by AWG-RYDMR using frequency Chirp RF　　　　　　　　　　　　　　　
  Akihiro Tateno; Hiroki Nagashima; Kiminori Maeda
  13th Asia-Pacific EPR/ESR Symposium 2024 (APES2024), Oct. 2024
  Oct. 2024 - Oct. 2024, English, Poster presentation
  共同研究・競争的資金等ID：48233901;48234047;32467067
• The quintet state generation process via inter- and intra-molecular singlet fission　　　　　　　　　　　　　　　
  Hiroki Nagashima; Yasui Matsunori; Shuhei Kawaoka; Seiji Akimoto; Takashi Tachikawa; Hiroshi Ikeda; Yasuhiro Kobori
  Rocky Mountain Conference 2019, Jul. 2019, [International conference]
  English, Poster presentation
• EPR and ENDOR studies on geometry of the reaction intermediates　　　　　　　　　　　　　　　
  Hiroki Nagashima
  4th Kanto Area Spin Chemistry Meeting, Nov. 2018, [Invited], [Domestic conference]
  English, Oral presentation
• Spin dynamics of the singlet-fission-born triplet pair analyzed by TREPR　　　　　　　　　　　　　　　
  Hiroki Nagashima
  Nov. 2018, [Domestic conference]
  Japanese, Oral presentation
• The mechanism of efficient charge separation reaction in photosystem II of higher plants　　　　　　　　　　　　　　　
  Hiroki Nagashima; Masashi Hasegawa; Reina Minobe; Hiroyuki Mino; Yasuhiro Kobori
  Sep. 2017, [Domestic conference]
  English, Poster presentation

• Apr. 2020 - Present
  Chemistry Today, Saitama University

• The mechanism of magnetic response generated by the structure of biomolecules　　　　　　　　　　　　　　　
  Oct. 2024 - Mar. 2028
  Saitama University, Principal investigator
  Grant number：JPMJPR24F7
  講演・口頭発表等ID：50284111
• 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　　　　　　　　　　　　　　　
  30 Jun. 2023 - 31 Mar. 2026
  Grant amount(Total)：6500000, Direct funding：5000000, Indirect funding：1500000
  Grant number：23K17662
  講演・口頭発表等ID：50284111
• Electron spin resonance study on the photo-induced structural change of the cryptochrome from Europian Robin.　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists, 01 Apr. 2021 - 31 Mar. 2023
  Saitama University
  Grant amount(Total)：4680000, Direct funding：3600000, Indirect funding：1080000
  Grant number：21K14581
  講演・口頭発表等ID：50284111
• Artificial Photosynthesis by Sodium Tantalate Photocatalysts: Multinational Collaboration in Fundamental Science　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)), 09 Oct. 2018 - 31 Mar. 2022
  Onishi Hiroshi, Kobe University
  Grant amount(Total)：17940000, Direct funding：13800000, Indirect funding：4140000
  Metal cations, doped into semiconductor photocatalysts for artificial photosynthesis, are impurities that compromise the periodic structure of the host semiconductor. The cations curiously reduce electron-hole recombination and enhance the yield of photocatalytic reactions. To unravel this intriguing phenomenon, a multinational team was assembled to scrutinize the structure of the doped photocatalysts. Two metal-oxide semiconductors, sodium tantalate and strontium titanate, were doped with hetero-metal cations such as lanthanum, strontium, barium, iron, manganese, and others. The local structures of these infused cations were detailed using techniques such as fluorescence X-ray holography, X-ray absorption fine structure, and scanning transmission electron microscopy.
  Grant number：18KK0161
• Study for the spin conversion mechanism in the multiexciton generated by the singlet fission　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists, Grant-in-Aid for Early-Career Scientists, 01 Apr. 2019 - 31 Mar. 2021
  Nagashima Hiroki, Saitama University
  Grant amount(Total)：4290000, Direct funding：3300000, Indirect funding：990000
  Singlet fission is a unique reaction which produces two triplet excitons from one singlet exciton. In this study, we measured time-resolved electron spin resonance to understand the spin conversion mechanism in the correlated triplet-triplet pair which is important to develop efficient singlet fission materials in future. The time-resolved electron spin resonance spectra of the singlet-fission-born quintet state revealed that geometric structures of the pair of singlet fission materials are related with the spin conversion. The study revealed that the structural flexibility of the singlet fission materials are important for spin conversion.
  Grant number：19K15506
• Development and application of new structural analysis on the light-induced radical pair by time-resolved electron spin resonance spectroscopy　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows, Grant-in-Aid for JSPS Fellows, 26 Apr. 2017 - 31 Mar. 2020
  Kobe University
  Grant amount(Total)：4420000, Direct funding：3400000, Indirect funding：1020000
  Grant number：17J01125
• ＥＮＤＯＲ法による光合成酸素発生における基質水分子の同定及び反応メカニズムの解明　　　　　　　　　　　　　　　
  25 Apr. 2014 - 31 Mar. 2017
  Grant amount(Total)：3200000, Direct funding：3200000
  Grant number：14J11113

• Science of quantum and color of molecule　　　　　　　　　　　　　　　
  lecturer
  High-grade global education program for Sciences, Saitama University, 17 May 2025 - 17 May 2025
• 電子スピン共鳴と鳥のコンパス　　　　　　　　　　　　　　　
  contribution
  28 Apr. 2021 - 28 Apr. 2021