A mixed-valence octanuclear iron-oxo pyrazolate: assessment of electronic delocalization by structural and spectroscopic analysis.
A mixed-valence octanuclear iron-oxo pyrazolate: assessment of electronic delocalization by structural and spectroscopic analysis.
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DOI：
10.1021/ic801459s
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发表时间：
2008-12-15
影响因子：
4.6
通讯作者：
Raptis RG
中科院分区：
文献类型：
--
作者：
Chakraborty I;Baran P;Sanakis Y;Simopoulos A;Fachini E;Raptis RG
A formally FeIII7FeII complex, containing an inner Fe4O4-cubane and four peripheral Fe-centers, is derived from the one-electron reduction of its FeIII8 precursor. Spectroscopic analysis of the former reveals that the redox activity of this Fe8-system is confined within its cubane core. The resulting (Fe4O4)3+-cubane, which is valence-delocalized in the NMR, Mössbauer and IR, but valence-trapped in the X-ray photoelectron spectroscopy (XPS) timescale, is better described as a Robin-Day class-II system by the analysis of its near infrared (NIR) intervalence charge transfer (IVCT) band profile.
