Regiocontrolled synthesis of poly(thiophene) derivatives: EL devices utilizing chiral poly(thiophene) derivatives

Abstract

We synthesized an optically active and regioregular poly(3-substituted thiophene), head-to-tail poly(3-[2-((S)-2-methylbutoxy)ethyl]thiophene (HT-P(S)MBET), according to a modified Rieke method. The HT-P(S)MBET was an optically active polymer with the head-to-tail linkage of 94 %. HT-P(S)MBET films showed longer maximum absorption wavelengths and lower bandgap than those of regiorandom poly(3-hexylthiophene). Organic light-emitting diodes (OLED) devices of HT-P(S)MBET showed red electroluminescence with a maximum wavelength of 697 nm.