Oxygen Evolution by Oxidation of Water with Manganese Porphyrin Dimers

Abstract

A functional model for the tetranuclear manganese cluster in the photosystem II of higher plants and cyanobacteria is now provided by binuclear dicationic manganese complexes such as 1. In the anodic oxidation of aqueous acetonitrile containing these complexes water is oxidized to oxygen by a four-electron process. An example of Ar is 4-tBuC6H4; counterion ClO.