N－芳基马来酰亚胺与硫代硫酸钠的电荷转移络合物研究

STUDIRS ON THE CHARGE TRANSFER COMPLEXES OF N-ARYLMALEIMIDES WITH SODIUM THIOSULFATE

本文以硫代硫酸根离子作为电荷给体（Ｄ），系列Ｎ－芳基取代马来酰亚胺（ＲＰｈＭＩ）作为电荷受体（Ａ），用含水５％的二甲基亚砜（９５％ＤＭＳＯ）为溶剂，以紫外可见分光光度法研究了ＲＰｈＭＩ与作用生成的电荷转移（ＣＴ）络合物。以其ＣＴ光谱计算了ＲＰｈＭＩ的电子亲合能（Ｅ_Ａ）．测定了ＣＴ络合物的生成常数Ｋ。结果显示，弱的受体Ｎ－马来酰亚胺与强的给体硫代硫酸根负离子可以生成稳定的ＣＴ络合物。文章还讨论了ＣＴ络合物的可能结构及取代基极性与ＣＴ络合物的稳定性关系。

The Charge transfer(CT)complexes formed between N-arylmaleimides(RPhMI)as the acceptors and thiosulfate anion as donor in 95% DMSO/H2O were studied by UV-Vis spectroscopy.The electron affinities(EA)of RPhMI had been calculated from the CT spectra,And the formation constants(K)of the CT complexes were determined.The results indicate that weak acceptors,N-arylmaleimides could form stable CT complexes with the thiosulfate anion which acts as a strong donor,The possible structure of the CT complexes and the relationship of their stability and the substituent polarlity of RPHMI were discussed.