単核銅複合体が酸素の4電子還元を触媒化した

Shunichi Fukuzumi¹, Hiroaki Kotani, Heather R Lucas

¹Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan. fukuzumi@chem.eng.osaka-u.ac.jp

Journal of the American Chemical Society

|May 7, 2010

まとめ

銅複合体は,酸素から水への変換を効率的に触媒化する. この触媒サイクルには,フェロセンの誘導体と陽子によって再生されるペロキシドコッパー中間物質が含まれています.

科学分野:

無機化学無機化学とは
カタリシスカタリシスカタリシス
電気化学電気化学について

背景:

銅複合体は,生物学的酸素減少に不可欠です.
酸素還元のための合成触媒の開発は,エネルギーアプリケーションにとって非常に重要です.

研究の目的:

単核銅複合体を,酸素から水への4電子還元のための触媒として調査する.
ペロキシドコッパー中間物質を含む触媒メカニズムを解明する.

主な方法:

銅複合体の電気化学的還元. 銅複合体の電気化学的還元.
還元された銅複合体の分子酸素との反応.
スペクトロスコピ的方法を用いた反応中間物質の特徴化.
フェロセーヌ誘導体 (Fc*) を還元剤として使用したメカニズム研究.

主要な成果:

単核Cu (((II)) 複合体は,O (((2) からH (((2) Oの還元のための効率的な触媒を示した.
銅複合体をFc*で還元し,次にO(2) と反応すると,過酸化銅 (II) 複合体が得られる.
ペロキシドコッパー (II) 複合体は,その後,陽子の存在でFc*によって還元され,活性Cu (II) 触媒を再生しました.

結論:

この研究は,酸素を水に還元するための効率的な触媒システムを提示しています.
重要なペロキシドコッパー中間物質を含む詳細なメカニズムが提案されました.
この研究は,酸素減少のための人工金属酵素の開発に寄与しています.

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