| Project/Area Number |
19F19034
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 外国 |
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| Review Section |
Basic Section 32010:Fundamental physical chemistry-related
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| Research Institution | Kyushu University |
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Principal Investigator |
恩田 健 九州大学, 理学研究院, 教授 (60272712)
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| Co-Investigator(Kenkyū-buntansha) |
KONINTI RAJ KUMAR 九州大学, 理学(系)研究科(研究院), 外国人特別研究員
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| Project Period (FY) |
2019-10-11 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2021: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2020: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2019: ¥600,000 (Direct Cost: ¥600,000)
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| Keywords | encapsulation / microporous crystal / MCM-41 / benzophenone / OLED / TADF / 光化学 / 多孔性シリカ / ゼオライト / ベンゾフェノン / 時間分解発光分光 / フェノチアジントリアジン / マイクロポーラスクリスタル / 時間分解赤外 |
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| Outline of Research at the Start |
本研究では、ナノ空間に置かれた分子の励起状態特性の理解とその制御を目的とする。そのために研究代表者の培ってきた時間分解赤外分光法(TRIR)の測定および解析の技術と分担者の持つ狭小空間作製技術を融合する。それにより、狭小空間に閉じ込められた様々な分子における励起状態プロトン移動や励起状態構造、発光ダイナミクスの詳細に理解する。その結果を元に分子と環境との相互作用の役割を明らかにし、適切な制御法を見いだす。
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| Outline of Annual Research Achievements |
Controlling excited-state characters of molecules is of great importance for developing novel photofunctional materials. Encapsulation of a molecule is one of the promising methods by coupling with rapid development of novel porous materials such as metal organic frameworks. Nevertheless, there is little information on excited characters in a small cavity due to experimental and theoretical difficulties. We developed the handling methods of molecules in a various nano- and micro-cavities and combined with our ultrafast spectroscopic techniques. As a result, we found that the emissive character of a prototypical emissive molecule, benzophenone, is dramatically changed when it is encapsuled in a nanocavity of mesoporous material, MCM-41. Aiming at applications of this novel phenomenon to luminescent devices, we also investigated encapsulation effects on emissive materials for organic light emitting diode (OLED), and found that the encapsulation highly improves their thermally activated fluorescence (TADF) activities. Recently, TADF activities have attracted much attention for applications not only to the emissive materials for OLED but also to the harvesting of long-lived triplet-states in various photofunctional materials. Thus, this new finding would be contributed to developments of novel highly efficient photofunctional devices. Moreover, we discovered that light irradiation accelerates encapsulation process for a certain type of emissive materials. This finding would open a new world such as light control of encapsulation and decapsulation of photofunctional molecules.
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| Research Progress Status |
令和3年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和3年度が最終年度であるため、記入しない。
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