摘要
用循环伏安法研究了［Ｍｏ_３ＯＣｌ_６（Ｏ_２ＣＲ）_３］－（其中Ｒ＝ＣＨ_３，Ｈ，ＣＨ_２Ｃｌ）系列三核钼簇合物在ＣＨ_３ＣＮ和ＤＭＦ溶剂中的电化学行为，并用差热－热重手段研究了它们的热稳定性和热分解过程的可能机理。结果表明在不同溶剂中它们有相似的二对氧化还原峰，而且在同一溶剂中随着Ｒ基团吸电子能力的增强，相应的第一氧化还原电位值向正向移动。当Ｒ＝ＣＨ_３，Ｈ时，它们的起始分解温度分别为２６５℃和２１０℃，即同样随着Ｒ基团吸电子能力的增强，起始分解温度降低。
Electrochemical behaviors for a series of trinuclear molybdenum cluster compounds[Mo_3OCl_6 (O_2CR)_3)￣-in acetonitrile and dimethylformide solvents were studied with cyclic voltammetry in this paper.Two redox peaks were assigned. The effect of changing R radical of carboxyl on the redox characteristics of these cluster compounds was discussed preliminarily.In addition, their thermal stability and the thermolytic behavior in nitrogen atmosphere were investigated by DTA-TG method. The effect of changing R radical on the thermal stability of the cluster compounds was discussed.Their possible thermolytic mechanism was also offered.
关键词
簇合物
电化学
热化学
钼
循环伏安法
trinuclear molybdenum cluster compound
electrochemistry
thermochemistry
