Synthesis and Spectral-Luminescent Properties of Chlorine-Containing Chromophores of the 1,4-Diarylbutadiene Series

Abstract

A method was proposed for the synthesis of new donor–acceptor chromophores containing a 1,4-diarylbutadiene fragment via heterocyclization of potassium 2-[(1Z,3Z)-4-aryl-4-chloro-1-cyanobuta-1,3-dien-1-yl]-1,1,3,3-tetracyanopropenides obtained by the reaction of (Z)-3-chloro-3-arylacrylaldehydes with the potassium salt of malononitrile trimer. A study of the spectral and luminescent properties of the obtained compounds in DMSO solution and in the solid state showed that the synthesized chromophores exhibit strong fluorescence in the yellow-orange region in the solid state, while their emission is weak in solution, indicating the presence of an aggregation-induced emission enhancement effect.