Charge-transfer complexations of 1,n-di(9-ethylcarbazol-3-yl)alkanes with tetracyanoethylene and tetranitromethane
作者:Erol Asker、John Masnovi
DOI:10.1016/j.saa.2008.07.034
日期:2009.1
dicarbazoles formed stable 1:1 electron donor-acceptor complexes with TCNE having formation enthalpies around -3.5kcal/mol. With TNM they formed more weakly bound complexes that showed little dependence on concentration and almost zero dependence on temperature changes having nearly 0kcal/mol enthalpies of formation. The smaller gap between the two carbazole groups in 1,n-di(9-ethylcarbazol-3-yl)alkanes with
1,n-二(9-乙基咔唑-3-基)烷烃,其中n = 1-5,作为聚-3-乙烯基咔唑的双色模型化合物被合成,以研究它们与电子受体四氰基乙烯(TCNE)和四硝基甲烷(TNM)。还包括9,9'-二乙基-3,3'-二咔唑基,二(3-乙基咔唑-9-基)甲烷和三种单体类似物用于比较。在二氯甲烷溶液中,二咔唑与TCNE形成稳定的1:1电子供体-受体配合物,TCNE的形成焓约为-3.5kcal / mol。用TNM,它们形成了更弱结合的复合物,对浓度几乎没有依赖性,而对温度变化的依赖性几乎为零,具有接近0kcal / mol的形成焓。1,n-二(9-乙基咔唑-3-基)烷烃中两个咔唑基团之间的较小间隙或= 3。