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本文报道了自合成的4种类立方烷型Fe_4S_4簇合物[Et_4N][Fe_4S_4(Et_2dtc)_4]、[Et_4N]_2·[Fe_4S_4(Et_2dtc)_4]、[Et_4N]_3[Fe_4S_4(Et_2dtc)_4]、[Bu_4N]_2[Fe_4S_4(PhS)_4]的UV-Vis和IR光谱数据,对照X光衍射测定结果,依据配体场弱场理论,对各光谱进行了分析和指认。讨论了配离子构型、中心离子氧化态对d-d带和荷迁移带的影响及键长、配位环境等几何因素与振动带的关系。
In this paper, we report the synthesis of four kinds of cubic Fe_4S_4 clusters [Et_4N] [Fe_4S_4 (Et_2dtc) _4], [Et_4N] _2 · [Fe_4S_4 (Et_2dtc) _4], [Et_4N] _3 [Fe_4S_4 (Et_2dtc) _4] , [Bu_4N] _2 [Fe_4S_4 (PhS) _4], the spectra were analyzed and identified according to the results of X-ray diffraction and field weak field theory. The effects of the ion configuration and the oxidation state of the central ion on the d-d band and the charge transfer band, as well as the relationship between the geometric factors such as the bond length and coordination environment and the vibrational band are discussed.