Facile synthesis and exploration of excited state assisted two-photon absorption properties of D–A–D type thiophene–pyridine derivatives

A series of trigonal-shaped molecules (TPyT and TPyP) and a polymer (P2TPy) with donor–acceptor–donor (D–A–D) structural arrangement were designed with thiophene and 2,4,6-trisubstituted pyridine as the backbone i.e., a 4-(4-(decyloxy)phenyl)-2,6-di(thiophen-2-yl)pyridine core structure, for the first time and synthesized via a microwave assisted one pot reaction. The extension of conjugation of the system by substituting thiophene acrylonitrile...