The effect of cyano substitution on the fluorescence behavior of 1,2-bis(pyridylphenyl)ethene was investigated. While nonsubstituted 1,2-bis(pyridylphenyl)ethene has fluorescence quantum yield of 97 % in CH 2 Cl 2 solution, cyano-substituted ones fluoresces very little. In contrast, both the no-substituted and the cyano-substituted ones fluoresce moderately in the solid state. The aggregate-induced enhanced emission (AIEE) behavior for the cyano-substituted 1,2-bis(pyridylphenyl)ethene was understood as that the severe quenching of the fluorescence in solution was not operating in the solid state. The fluorescent behaviors in solution and in the solid state are discussed in terms of the emission and the nonradiative decay rate constants.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.