系列Fe_4S_4簇合物的光谱分析  

Spectroscopic Analysis of a Series of Fe_4S_4 Clusters

作　　者：牛淑云[1] 李淑琴[1] 南玉明[1] 徐吉庆[1] 蔡辉[1] 王铁钢[1] 

机构地区：[1]吉林大学化学系

出　　处：《高等学校化学学报》1991年第12期1659-1662,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：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。The data of electronic and infrared spectra are reported for the following four Fe4S4 clusters: ( Ⅰ) [Et4N][Fe4S4(Et2dtc)4], (Ⅱ) [Et4N],[Fe4S4(Et2dtc)4], (Ⅲ) [Et4N]3[Fe4S4 (Et2dtc)4], (W) [Bu4N]2[Fe4S4(Ph-S)4]. According to the weak-ligand-field theory and the structure informations provided by X-ray diffraction, all the spectra were analyzed, assigned and listed in this paper. Comparing the individual spectra with each other, the following regulations can be drawn: (1) If the geometric structures of coordination anions are the same, the change of valence state of the central ion causes the apparent shifts of d-d bands in the electronic spectra and maintains infrared spectra principally. (2) In the coordination anions, the increase of oxidation state of the central ion results in the red-shift of M←L charge transfer bands. (3) If electron-pushing ability of the groups connected with the coordinating atom increases, the vibration bands of M-L bond move to the higher frequencies. These regulations above just show that our assignment to the spectra is reasonable.

关 键 词：Fe4S4 簇合物 类立方烷型 光谱分析 

分 类 号：O614.811[理学—无机化学]