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電子と陽子の源として水を使用するNADをRegioselectiveReduction (P) ⁺に変換する人工光合成

Young Hyun Hong¹, Madhuri Nilajakar¹, Yong-Min Lee¹

¹Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.

Journal of the American Chemical Society

|February 13, 2024

まとめ

人工光合成は,二酸化炭素の削減に不可欠な分子であるNAD (P) Hを生成するために水を用いることで自然を模倣する. この研究は,光システムIと光システムIIの分子モデルを使用して,水からNADと酸素を生成することで,この偉業を達成しています.

科学分野:

生物化学
写真化学
人工光合成

背景:

光合成は,光システムII (PSII) の水由来電子と陽子を利用して,光システムI (PSI) のNAD (P) +をNAD (P) Hに還元する.
この過程を模倣する人工光合成は依然として課題である.

研究の目的:

水からNAD (P) Hを生成するために光システムIと光システムIIを模倣する人工システムを開発する.
自然光合成のステキオメトリックプロセスを人工システムで達成する.

主な方法:

PSIとPSIIの分子モデルを作りました
結合PSIモデル (ヒドロキノン誘導体,アクリドニウムイオン,コバロキシム,NAD (P) +) の減少.
水酸化のための結合PSIIモデル ([(N4Py) FeII]2+).
膜を用いた統合PSIとPSIIモデル

主要な成果:

PSIモデルを使用して達成されたNAD (P) +をNAD (P) Hに光触媒的に還元する.
PSIIモデルで観測された水から酸素への酸化.
統合システムは,ターンオーバー数54の水からNAD (P) Hを成功裏に生成しました.
合成光合成の初演で,水によるNAD (P) +還元によりNAD (P) HとO2のステキオメトリーが得られる.

結論:

PSIとPSIIを模倣した最初の人工光合成システムを開発した.
電子と陽子の源として水を用いてNADとP) Hを成功裏に生成した.
このシステムは持続可能な化学生産における人工光合成の可能性を示しています

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