钒酰—亚胺配合物的ESR波谱研究

ESR STUDIES ON IMINATO-VO(Ⅱ) COMPLEXES

本文研究了二(邻羟亚苄基胺)钒酰配合物在一系列有机溶剂中的ESR波谱。室温下,g值在不同溶剂中的变化有如下次序:CHCl_3>py>CH_3CN>THF>CH_3OH,α值的趋势为:THF>CH_3CN>CHCl_3>py≈CH_3OH.通过在THF及py溶剂中的低温ESR波谱得到的g_(11)、g_1、A_(11)、A_1、计算出了β_2^(*2)、K、β_1^(*2)、β_1^(′*)、ε_π~*、ε_π^(′*)等键参数,并讨论了溶剂对配合物电子结构的影响.

Oxovanadium(IV) salicylaldimines have extensively been studied by ESR spectroscopy in a variety of organic solvents. At room temperature, g-value decreases in order: CHCl3, py,CH3CN, THF, CH3OH while α-value decreases in order: THF, CH3CN, CHCl3, py, CH3OH. From the spin Hamiltonian parameters obtained at low temperature, some bond parameters β2*2 ,κ,β1*2,β*,επ*,επ* have been calculated, and the effect of solvent on electron structures of the complexes has also been discussed.