A synthetic Mn4Ca-cluster mimicking the oxygen-evolving center of photosynthesis

Chunxi Zhang, Changhui Chen, Hongxing Dong, Jian Ren Shen, Holger Dau, Jingquan Zhao

Research output: Contribution to journalArticle

242 Citations (Scopus)

Abstract

Photosynthetic splitting of water into oxygen by plants, algae, and cyanobacteria is catalyzed by the oxygen-evolving center (OEC). Synthetic mimics of the OEC, which is composed of an asymmetric manganese-calcium-oxygen cluster bound to protein groups, may promote insight into the structural and chemical determinants of biological water oxidation and lead to development of superior catalysts for artificial photosynthesis. We synthesized a Mn4Ca-cluster similar to the native OEC in both the metal-oxygen core and the binding protein groups. Like the native OEC, the synthetic cluster can undergo four redox transitions and shows two magnetic resonance signals assignable to redox and structural isomerism. Comparison with previously synthesized Mn3CaO4-cubane clusters suggests that the fourth Mn ion determines redox potentials and magnetic properties of the native OEC.

Original languageEnglish
Pages (from-to)690-693
Number of pages4
JournalScience
Volume348
Issue number6235
DOIs
Publication statusPublished - May 8 2015

ASJC Scopus subject areas

  • General

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