Shape-shifting tetranuclear oxo-bridged manganese cluster: Relevance to photosystem II water oxidase active site

被引：28

作者：

Mukhopadhyay, S

Mok, HJ

Staples, RJ

Armstrong, WH ^{[1
]}

机构：

[1] Boston Coll, Eugene F Merkert Chem Ctr, Dept Chem, Chestnut Hill, MA 02467 USA

[2] Harvard Univ, Dept Chem & Biol Chem, Cambridge, MA 02138 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 30期

关键词：

D O I：

10.1021/ja0475508

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The redox properties of the "dimer-of-dimers" complex, [{Mn2(μ-O)2(tphpn)}2]4+ (1) (where Htphpn = N,N,N′,N′-tetra(2-methylpyridyl)-2-hydroxypropane-diamine) were investigated. The structure changes dramatically to an adamantane-shaped core upon one-electron oxidation. On the other hand, the one-electron reduced product of 1, [Mn4O4(tphpn)2]3+, exhibits a hyperfine-structured multiline EPR signal very similar to the so-called S0 state of the tetramanganese cluster, which resides at the Photosystem II water oxidase active site. Copyright © 2004 American Chemical Society.

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页码：9202 / 9204

页数：3

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