A Mixed-Valence Octanuclear Iron-Oxo Pyrazolate: Assessment of Electronic Delocalization by Structural and Spectroscopic Analysis

被引：31

作者：

Chakraborty, Indranil ^{[1
,2
]}

Baran, Peter ^{[1
,2
]}

Sanakis, Yiannis ^{[3
]}

Simopoulos, Athanassios ^{[3
]}

Fachini, Esteban ^{[1
,2
]}

Raptis, Raphael G. ^{[1
]}

机构：

[1] Univ Puerto Rico, Dept Chem, San Juan, PR 00931 USA

[2] Univ Puerto Rico, Inst Funct Nanomat, San Juan, PR 00931 USA

[3] NCSR Demokritos, Inst Mat Sci, Athens 15310, Greece

来源：

INORGANIC CHEMISTRY | 2008年 / 47卷 / 24期

关键词：

D O I：

10.1021/ic801459s

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A formally Fe(III)7Fe(II) complex, containing an inner Fe4O4-cubane and four peripheral Fe centers, is derived from the one-electron reduction of its Fe-8(III) precursor. Spectroscopic analysis of the former reveals that the redox activity of this Fee system is confined within its cubane core. The resulting (Fe4O4)(3+)-cubane, which is valence-delocalized in the NMR, Mossbauer, and IR spectroscopy time scales but valence-trapped in the X-ray photoelectron spectroscopy (XPS) time scale, is better described as a Robin-Day class-II system by the analysis of its near-infrared (NIR) intervalence charge transfer (IVCT) band profile.

引用

页码：11734 / 11737

页数：4

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