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2022 Fiscal Year Final Research Report

Mapping of energy and electron transfer pathways in photosynthesis by transient two-dimensional infrared spectroscopy

Research Project

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Project/Area Number 21K20545
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
Research InstitutionInstitute for Molecular Science

Principal Investigator

Yoneda Yusuke  分子科学研究所, 協奏分子システム研究センター, 助教 (60903721)

Project Period (FY) 2021-08-30 – 2023-03-31
Keywords二次元分光 / 振動分光 / 光合成 / エネルギー移動
Outline of Final Research Achievements

Photosynthesis is essential for life on earth as it is the origin of oxygen and food. In the initial process of photosynthesis, excitation energy and electrons are efficiently transferred between pigment molecules that are intricately arranged in proteins. Thus, it is important to elucidate the mechanism of these ultrafast reactions. In this study, we developed a new multi-dimensional vibrational spectroscopy that can report the correlation of vibrational manifolds on excited states with unprecedented quality. This method will allow us to map the complex excitation and electron transfer pathways in the initial process of photosynthesis.

Free Research Field

物理化学

Academic Significance and Societal Importance of the Research Achievements

今回構築した多次元振動分光装置(2D-ISRS)は実験的困難さからこれまで測定に成功した報告は世界的にもまだ数例程度しかなかった。本研究では高速スキャンによる独自の検出システムを用い、高効率なデータ取得を実現することで、世界的にもトップクラスのクオリティで2D-ISRSの測定に成功した。本研究によって励起状態における複雑な反応を理解するための新しい実験手法が確立したため、今後この手法を用いた系統的な研究を行うことで、高効率な光エネルギー変換系を構築するための重要な学理的指針が得られると期待される。

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Published: 2024-01-30  

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