Synthesis of nonlinear optical chromophores containing electron-excessive and -deficient heterocyclic bridges. The auxiliary donor–acceptor effects

Abstract

Push-pull substituted nonlinear optical chromophores with thiazole and thiophene rings and interposed ethylene units as π-conjugated bridges were synthesized. The effects of the nature and location of the heterocycles on the energy of the charge transfer transition for the chromophores are discussed.