Infrared spectroelectrochemical evidence for alkyl viologen radical monomers in acetonitrile
作者:St�phane H. R. Brienne、Ralph P. Cooney、Graham A. Bowmaker
DOI:10.1039/ft9918701355
日期:——
Fourier-transform infrared reflection–absorption spectra of the electrogenerated radical monocation of N,N′-diheptyl-4,4′-dipyridinium dibromide (HV) in monomeric (acetonitrile solutions) and dimeric-film (aqueous media) forms were obtained using potential-difference and polarisation-modulation techniques. By comparison with results for the radical products obtained by the electroreduction of N,N′-dimethyl-4,4′-dipyridinium (MV) and 2,2′-dicyano-N,N′-dimethyl-4,4′-dipyridinium (DCMV) in both media, evidence was obtained for an intramolecular intensity enhancement of selected modes for the solution monomer.
利用电位差和极化调制技术,获得了 N,N′-二庚基-4,4′-二吡啶鎓二溴化物(HV)在单体(乙腈溶液)和二聚体薄膜(水介质)形式下的电生自由基一价的傅立叶变换红外反射吸收光谱。通过与 N,N′-二甲基-4,4′-二吡啶鎓(MV)和 2,2′-二氰基-N,N′-二甲基-4,4′-二吡啶鎓(DCMV)在这两种介质中的电还原所得到的自由基产物的结果进行比较,得到了溶液单体的选定模式的分子内强度增强的证据。