Biomimetic approach to the oxygen evolving center:: resonance Raman investigation of a manganese μ-oxo dimer in three oxidation states

被引：6

作者：

Albela, B ^{[1
]}

Chottard, G ^{[1
]}

Girerd, JJ ^{[1
]}

机构：

[1] Univ Paris Sud, Chim Inorgan Lab, CNRS, UMR 8613, F-91405 Orsay, France

来源：

JOURNAL OF BIOLOGICAL INORGANIC CHEMISTRY | 2001年 / 6卷 / 04期

关键词：

photosystem II; oxygen evolving center; resonance Raman; manganese mu-oxo complexes; phenolate;

D O I：

10.1007/s007750100220

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A biologically relevant dinuclear manganese mono-mu -oxo complex with a bound phenolate ligand in three oxidation states, (III,III), (III,TV) and (IV,IV), was studied using resonance Raman spectroscopy. Depending upon the excitation frequency, phenolate vibrations or mu -oxo vibrations were enhanced, which allowed us to assign the UV-visible absorption spectra. In the case of the mixed valence species (III,IV), the mu -oxo vibration at 854 cm(-1) has been assigned by isotopic substitution ((H2O)-O-18) to v(as)(Mn-O-Mn). This preferential enhancement of the asymmetric vibration stresses the asymmetric character of the bridge.

引用

页码：430 / 434

页数：5

共 18 条

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