Premium
The Effect of Cyano Substitution on the Fluorescence Behavior of 1,2‐Bis(pyridylphenyl)ethene
Author(s) -
Nishio Suguru,
Higashiguchi Kenji,
Matsuda Kenji
Publication year - 2014
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.201402024
Subject(s) - chemistry , fluorescence , quantum yield , photochemistry , quenching (fluorescence) , solid state , yield (engineering) , aggregation induced emission , thermodynamics , optics , physics
Abstract 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.