Mossbauer spectroscopic study of oxo-centered mixed-valence trinuclear iron fumarate

被引：1

作者：

Afroj, D ^{[1
]}

Katada, M ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Sci, Tokyo 1920397, Japan

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2002年 / 251卷 / 03期

关键词：

D O I：

10.1023/A:1014854813869

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Oxo-centered wmixed-valence trinuclear iron dicarboxylic acid complex iron fumarate [Fe3O(O2CCH=CHCO2)(3)(H2O)(3)].nH(2)O (n = 18-19), have been synthesized firstly. Variable temperature Mossbauer spectroscopy has been carried out to elucidate the rate of intramolecular electron transfer. It was found that the complex showed a temperature dependent mixed-valence state. At low temperature two quadrupole split doublets were observed corresponding to high spin Fe(III) and high spin Fe(II) state and a complete averaged valence state was observed at about 270 K At temperatures between 200 and 270 K the spectra showed relaxation effect as the electron transfer rate was comparable to the Mossbauer timescale (similar to10(-7) s).

引用

页码：493 / 497

页数：5

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