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Soluble Conducting Polymers By Electrochemical Polymerization Of Thiophenes Having Long Alkyl Substituents
Published 1987 · Chemistry
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Abstract Poly(3-hexylthiophene) (PHT), poly(3-octylthiophene) (POT), poly(3-dodecylthiophene) (PDDT), poly(3-octadecylthiophene) (PODT) and poly(3-eicosylthiophene) (PEIT) were electrochemically prepared. Their conductivities were 95-11 S/cm. Neutral PHT, POT and PDDT were soluble in chloroform, their degrees of polymerization being 2.3 × 102, 1.4 × 102 and 9 × 10, respectively. An as-grown film and the films cast from the oxidized and neutral PDDT solution in chloroform were found to be electrochemically active. Visible-near infrared spectra of the PDDT film as a function of oxidation potential resembled those of poly(3-methylthiophene) and poly(3-ethylthiophene). The oxidized PDDT in chloroform solution showed absorption spectra suggesting the existence of bipolarons.