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DOI: 10.1039/A900075E (Paper) Reference Section for: J. Mater. Chem., 1999, 9, 1719-1726

Synthesis, polymerization and characterization of substituted dithieno[3,4-b:3′,4′-d]thiophenes

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Seiji Inaoka and David M. Collard

Abstract

Chemical or electrochemical oxidation of substituted dithieno[3,4-b:3′,4′-d]thiophenes provides polymers with defined regiochemical structures. These materials have lower bandgaps (0.7-0.9 eV) than the unsubstituted fused heteroarene. Potential cycling of the 1,3-dimethyl substituted polymer film shows repetitive p- and n-dopability. The chemically-prepared dioctyl analog is soluble in common solvents such as chloroform, dichloromethane and THF. However, overoxidation of the polymers at an electrode surface presents a limitation to the polymerization of substituted analogs of the parent fused heteroarene.

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