水氧化和放氧复合体系的恢复系统模型。

A model for the water-oxidation and recovery systems of the oxygen-evolving complex.

机构信息

International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan.

出版信息

Dalton Trans. 2014 Feb 28;43(8):3063-71. doi: 10.1039/c3dt52846d.

DOI:10.1039/c3dt52846d

PMID:24323354

Abstract

We propose a model for the water-oxidation and recovery systems of the oxygen-evolving complex (OEC) of the photosystem II (PSII) enzyme. The whole system is constructed from two catalytic cycles, conducted as a tandem reaction: (i) a water-oxidation loop uses cerium(IV) ammonium nitrate as an oxidant to activate a dimanganese complex for water-oxidation and thereby liberate a molecule of O2 and (ii) a recovery loop begins with photoinhibition of the dimanganese complex but then uses O2 to reactivate the manganese centre. The net result is a catalytic water-oxidation catalyst that can use self-generated O2 for recovery.

摘要

我们提出了一个光合作用系统 II（PSII）中氧释放复合物（OEC）的水氧化和恢复系统模型。整个系统由两个催化循环构建而成，作为串联反应进行：（i）水氧化循环使用硝酸铈(IV)铵作为氧化剂激活二锰配合物进行水氧化，从而释放出一个氧气分子；（ii）恢复循环从二锰配合物的光抑制开始，但随后使用氧气重新激活锰中心。最终的结果是一种催化水氧化催化剂，它可以利用自身产生的氧气进行恢复。