AbstractDicyanopyrazinylviologens (4-5) can be prepared by the reaction of 2-bromomethyl-3-phenyl-5,6-dicyanopyrazine with some bipyridines. Their absorption spectra and electronic properties are correlated with their chemical structures.Keywordsazomethine ylidsbipyridinesdyeselectrochromismpyrazinesviologensReferences1. Jaung J.Y. , Matsuoka M. , and Fukunishi K. , Dyes and Pigments, 1997, 34, 255.2. Jaung J.Y. , Matsuoka M. , and Fukunishi K. , Dyes and Pigments, 1998, 36, 395.3. Jaung J.Y. , Matsuoka M. , and Fukunishi K. , Dyes and Pigments, 1998, 37, 135.
