Supramolecular Mn-Ca aggregates as models for the photosynthetic water oxidation complex

被引：29

作者：

Gorun, SM ^{[1
]}

Stibrany, RT

Lillo, A

机构：

[1] Brown Univ, Dept Chem, Providence, RI 02912 USA

[2] ExxonMobil Res & Engn Co, Annandale, NJ 08801 USA

来源：

INORGANIC CHEMISTRY | 1998年 / 37卷 / 05期

关键词：

D O I：

10.1021/ic9713083

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Mn(4)/(AE)(2) complexes, AE=Ca,1 or Ba,2, display Mn(3)(III)Mn(II) valence-trapped states and Jahn-Teller compressed Mn(III) ions, consistent with the S(0) (or S(-2)) oxidation level of PSII. Ba(2+) and Ca(2+) ligate Mn-bonded carboxylate oxygens either directly or via H(2)O molecules, respectively. The (O-H-O)(3-) ligand, symmetric, mu(4), as in 1, is asymmetric, mu(5), in 2, part of a mu(3)-oxo Mn(2)Ba unit. AE dependent acetate ligation to Mn is also observed. 1 and 2 have biomimetic catalase activity.

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页码：836 / 837

页数：2

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DISMUKES GC, COMMUNICATION

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