Electrosynthesis and charge-transport properties of poly(3′,4′-ethylenedioxy-2,2′:5′,2′′-terthiophene)

Polythiophene containing 3,4-ethylenedioxythiophene (EDOT), poly(3′,4′-ethylenedioxy-2,2′:5′,2′′-terthiophene), was synthesized by electrochemical oxidation of the corresponding monomer, 3′,4′-ethylenedioxy-2,2′:5′,2′′-terthiophene, in acetonitrile. The resulting polymer was soluble in DMSO and THF, and was characterized by 1H NMR and mass spectroscopies, and GPC. The electrical conductivity of the oxidized polymer film was found to be comparable to those for polythiophene and poly(methylthiophene) despite of its short π-conjugation length.