Optoelectronic properties of thiazole‐based polythiophenes

Abstract

In this work, two thiazole-containing monomers N-(thiazol-2-yl)22-(thiophen-3-yl)acetamide (ThDBTH) and N,N 0 -([4,4 0 -bithiazole]-2,2 0 -diyl)bis(2-(thiophen-3-yl)acetamide) (Th 2 DBTH) were synthesized through amidification reaction of 2-(thiophen-3-yl)acetyl chloride with aminothiazole derivatives and characterized by FTIR and 1 H and 13 C-NMR. The monomers were subjected to electrochemical polymerization and optoelectronic properties of the resultant conducting polymers were investigated. Additionally, copolymerization of ThDBTH in the presence of thiophene was achieved. PThDBTH, PTh 2 DBTH, and P(ThDBTH-Th) exhibited optical band gaps of 2.15, 2.30, and 1.95 eV, respectively. Switching time and optical contrast of the polymers were evaluated via kinetic studies. The P(ThDBTH-Th) revealed satisfactory switching time and appropriate optical contrast of 1.27 s and 24.97%, respectively.