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氢氧根对锰(V)氧配合物的亲核进攻:光系统II放氧复合体中氧-氧键形成的一个模型。

Nucleophilic attack of hydroxide on a Mn(V) oxo complex: a model of the O-O bond formation in the oxygen evolving complex of photosystem II.

作者信息

Gao Yan, Akermark Torbjörn, Liu Jianhui, Sun Licheng, Akermark Björn

机构信息

Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691 Stockholm, Sweden.

出版信息

J Am Chem Soc. 2009 Jul 1;131(25):8726-7. doi: 10.1021/ja901139r.

Abstract

A manganese(III) corrole complex, 1, has been synthesized and used to study a potential mechanism for oxidation of water to molecular oxygen. Oxidation by t-BuOOH gave the Mn(V)=O complex 2. Addition of hydroxide led to release of oxygen via the Mn(IV) complex 4 and regeneration of complex 1. It could be shown that the oxygen from (18)O-labeled water was incorporated in both the formed molecular oxygen and the peroxy intermediate 4.

摘要

一种锰(III)卟吩配合物1已被合成,并用于研究水氧化为分子氧的潜在机制。叔丁基过氧化氢氧化得到锰(V)=O配合物2。加入氢氧根会通过锰(IV)配合物4释放氧气,并使配合物1再生。可以证明,来自(18)O标记水的氧既掺入了生成的分子氧中,也掺入了过氧中间体4中。

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