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Coordination Polymer. Inorganic Chemistry 60, 6140–6146 (2021).
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crystal EuBaCo2O5.39. Applied Materials Today 24, 101167 (2021).
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Matsui, Y. et al. Aggregation-induced emission active thermally-activated
delayed fluorescence materials possessing N-heterocycle and sulfonyl groups.
Journal of Materials Chemistry C 10, 4607–4613 (2022).
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electron injection from perylene bisimide to wide bandgap semiconductor
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stepwise two-photon ionization in solutions as revealed by pump–repump–probe
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Publication lists
Original papers
1.
“Suppression of Structural Change upon S1-T1 Conversion Assists the Thermally
Activated Delayed Fluorescence Process in Carbazole-Benzonitrile Derivatives”
Masaki Saigo, Kiyoshi Miyata, Sei’ichi Tanaka, Hajime Nakanotani, Chihaya
Adachi and Ken Onda,
The Journal of Physical Chemistry Letters, 10, 2475-2480 (2019).
(Chapter 3)
2.
“Environmental Dependence of Thermally Activated Delayed Fluorescence and
Structural Dynamics in Carbazole-Benzonitrile Derivatives”
Masaki Saigo, Kiyoshi Miyata, Hajime Nakanotani, Chihaya Adachi, Eiji
Nishibori, Masaki Hada, and Ken Onda
(Manuscript in preparation)
(Chapter 4)
3.
“Characterization of Excited States in a Multiple-Resonance-Type Thermally
Activated Delayed Fluorescence Molecule Using Time-Resolved Infrared
Spectroscopy”
Masaki Saigo, Yuushi Shimoda, Takumi Ehara, Tomohiro Ryu, Kiyoshi Miyata,
and Ken Onda
Bulletin of the Chemical Society of Japan, 95, 381-388 (2022).
(Chapter 5)
176
Joint papers
1.
“Investigation of excited state, reductive quenching, and intramolecular electron
transfer of Ru(II)–Re(I) supramolecular photocatalysts for CO2 reduction using
time-resolved IR measurements”
Kazuhide Koike, David C Grills, Yusuke Tamaki, Etsuko Fujita, Kei Okubo,
Yasuomi Yamazaki, Masaki Saigo, Tatsuhiko Mukuta, Ken Onda, Osamu Ishitani
Chemical Science, 9, 2961-2974 (2018).
2.
“Intramolecular-rotation driven triplet-to-singlet upconversion and fluctuation
induced fluorescence activation in linearly connected donor–acceptor molecules”
Yuushi Shimoda, Kiyoshi Miyata, Masaki Saigo, Youichi Tsuchiya, Chihaya
Adachi, Ken Onda
The Journal of Chemical Physics, 153, 204702 (2020).
3.
“Guest-Tunable Excited States in a Cyanide-Bridged Luminescent Coordination
Polymer”
Kenta Sasaki, Haruka Yoshino, Yuushi Shimoda, Masaki Saigo, Kiyoshi Miyata,
Ken Onda, Kunihisa Sugimoto, Hitomi Yamate, Hiroki Miura, Benjamin Le Ouay,
Ryo Ohtani, Masaaki Ohba
Inorganic Chemistry, 60, 6140-6146 (2021).
4.
“Achieving Thermally Activated Delayed Fluorescence from Benzophenone by
Host–Guest Complexation”
Raj Kumar Koninti, Kiyoshi Miyata, Masaki Saigo, Ken Onda
The Journal of Physical Chemistry C, 125, 17392-17399 (2021).
5.
“Photoinduced oxygen transport in cobalt double-perovskite crystal EuBaCo2O5. 39”
Masaki Hada, Satoshi Ohmura, Tadahiko Ishikawa, Masaki Saigo, Naoya Keio,
Wataru Yajima, Tatsuya Suzuki, Daisuke Urushihara, Kou Takubo, Yusuke
Masaki, Makoto Kuwahara, Kenji Tsuruta, Yasuhiko Hayashi, Jiro Matsuo,
177
Takayoshi Yokoya, Ken Onda, Fuyuki Shimojo, Muneaki Hase, Sumio Ishihara,
Toru Asaka, Nobuyuki Abe, Taka-hisa Arima, Shin-ya Koshihara, Yoichi Okimoto
Applied Materials Today, 24, 101167 (2021).
6.
“Heavy metal-free visible-to-UV photon upconversion with over 20% efficiency
sensitized by a ketocoumarin derivative”
Masanori Uji, Naoyuki Harada, Nobuo Kimizuka, Masaki Saigo, Kiyoshi Miyata,
Ken Onda, Nobuhiro Yanai
Journal of Materials Chemistry C, 10, 4558-4562 (2022).
7.
“Aggregation-induced Emission Active Thermally-activated Delayed Fluorescence
Materials Possessing N-Heterocycle and Sulfonyl Groups”
Yasunori Matsui, Yudai Yokoyama, Takuya Ogaki, Kenta Ishiharaguchi, Akitsugu
Niwa, Eisuke Ohta, Masaki Saigo, Kiyoshi Miyata, Ken Onda, Hiroyoshi Naito,
and Hiroshi Ikeda
Journal of Materials Chemistry C, 10, 4607-4613 (2022).
8.
“Eliminating the Reverse ISC Bottleneck of TADF Through Excited State
Engineering and Environment-Tuning Toward State Resonance Leading to MonoExponential Sub-µs Decay. High OLED External Quantum Efficiency Confirms
Efficient Exciton Harvesting”
Hartmut Yersin, Rafał Czerwieniec, Larisa Mataranga-Popa, Jan-Michael Mewes,
Gang Cheng, Chi-Ming Che, Masaki Saigo, Shuji Kimura, Kiyoshi Miyata, Ken
Onda
Advanced Functional Materials, 32, 2201772 (2022).
9.
“Solvent-dependent dual emission processes in charge-transfer excited states of
phenothiazine-triphenyltriazine conformers”
Tomohiro Ryu, Kiyoshi Miyata, Masaki Saigo, Yuushi Shimoda, Youichi
Tsuchiya, Hajime Nakanotani, Chihaya Adachi, Ken Onda
Chemical Physics Letters, 809, 140155 (2022).
178
10. “Singlet fission as a polarized spin generator for dynamic nuclear polarization”
Yusuke Kawashima, Tomoyuki Hamachi, Akio Yamauchi, Koki Nishimura, Yuma
Nakashima, Saiya Fujiwara, Nobuo Kimizuka, Tomohiro Ryu, Tetsu Tamura,
Masaki Saigo, Ken Onda, Shunsuke Sato, Yasuhiro Kobori, Kenichiro Tateishi,
Tomohiro Uesaka, Go Watanabe, Kiyoshi Miyata, Nobuhiro Yanai
Nature Communications, 14, 1056 (2023).
179
Acknowledgments
This doctoral thesis is the summary of the author’s studies conducted under the
supervision of Professor Ken Onda at the Department of Chemistry, Graduated School of
Science, Kyushu University, from April 2017 to February 2023.
The author would like to express my deepest gratitude to Professor Ken Onda
for supervising this thesis, providing an excellent research environment, helpful
discussion, and supporting all my works. The author would also like to express my deep
appreciation to Associate Professor Kiyoshi Miyata for his insightful comments and
guidance for my work and life.
The author sincerely appreciates Professor Yuichiro Hori, Professor Nobuaki
Matsumori, and Associate Professor Takuya Horio for co-supervision of this thesis and
insightful advice from many perspectives.
The author would like to appreciate Professor Chihaya Adachi, Associate
Professor Hajime Nakanotani, and Associate Professor Yoichi Tsuchiya at Center for
Organic Photonics and Electronics Research (OPERA), Kyushu University, for providing
the samples and valuable discussions.
The author would like to appreciate Professor Eiji Nishibori and Associate
Professor Masaki Hada at University of Tsukuba for performing the crystal structure
analysis of o-3CzBN shown in Chapter 4.
The author would like to thank Dr. Tatsuhiko Mukuta and Dr. Sei’ichi Tanaka at
Tokyo Institute of Technology for their support in starting up the laboratory and for
teaching him about your experimental and computational techniques.
180
The author would like to thank all the members of Onda laboratory for their kind
support not only for my work but also for his daily life. The author also would like to
thank all the collaborators.
The author also thanks Japan Society for the Promotion of Science for the
financial support of the Research Fellowship for Young Scientists.
Finally, the author would like to express his gratitude to his family for always
supporting him during his long student life.
Masaki Saigo
February 2023
181
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