Organic compounds that contain two or more thiophene rings bridged together; thiophenes are a five-membered ring with four carbon atoms and one sulfur atom. Oligothiophenes are important organic electronic materials.
2,2?:5?,2??-Terthiophene undergoes electrochemical copolymerization along with carbazole and in sodium perchlorate/acetonitrile was reported. Electrochromic copolymer based on TTh and 3, 4-ethylenedioxythiophene has been reported.