Random π-Conjugated Copolymers Constituted of Electron-donating Thiophene Units and Electron-accepting Pyridine Units

Abstract

Abstract Dehalogenation copolymerization of 2,5-dibromothiophene and 2,5-dibromopyridine with zero-valent nickel complex gives random copolymers with molecular weight of 5 × 104–5 × 106. They show unique doping-undoping cycles which are accounted for by shift of lone pair electron of pyridine ring to p-doped thiophene ring.