2021 Fiscal Year Final Research Report
Experimental and theoretical analyses on energy flow in natural and artificial photosynthesis
| Project Area | Creation of novel light energy conversion system through elucidation of the molecular mechanism of photosynthesis and its artificial design in terms of time and space |
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| Project/Area Number |
17H06437
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Complex systems
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| Research Institution | Kwansei Gakuin University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
石崎 章仁 分子科学研究所, 理論・計算分子科学研究領域, 教授 (60636207)
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| Project Period (FY) |
2017-06-30 – 2022-03-31
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| Keywords | 光合成 / 集光性色素タンパク質複合体 / 超高速レーザー分光 / コヒーレント分光 / エネルギー・フロー |
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| Outline of Final Research Achievements |
In this investigation we were successful to clarify the functional mechanisms of the chlorophyll-derivatives based bio-inspired organic solar cell that mimic the natural photosynthesis. We were also successful to enhance the photovoltaic performance of this bio-inspired organic solar cell using hydroquinone redox-mediator. In addition, we were successful to construct the artificial light-harvesting system that exceeds the limit of the natural light-harvesting capacity by the incorporation of the higher plant carotenoid, which possesses the ICT character in its excited state, to the bacterial LH1 light-harvesting system. Excitation energy-transfer and relaxation dynamics of this artificial antenna were fully addressed by ultrafast laser spectroscopy. Moreover, we have developed theoretically the novel spectroscopic technique that utilizes the quantum entangled photons as a pseudo-thermal light source that mimics the sunlight.
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| Free Research Field |
光合成、人工光合成、超高速レーザー分光
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| Academic Significance and Societal Importance of the Research Achievements |
海洋藻類の光合成アンテナ系では，光学禁制なS1励起状態に共役した分子内電荷移動（ICT）励起状態を発現することで，高効率なエネルギー伝達を実現している。この叡智を紅色光合成細菌の光合成アンテナ系に組み込み，前人未踏の超高効率アンテナ系を創出した点が本研究成果の学術的意義である。本研究成果の社会的意義は，光合成機能を利用した新規光エネルギー変換素子の開発に直結することに留まらず，光産業分野において重要な課題となっている地球資源・環境に適応した太陽光エネルギーの有効利用に関する一定の指針を提示していることである。
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