Anodic coupling of dipyrrole on thin films of poly(4-butanesulfonate−cyclopentadithiophene) in acetonitrile produces polypyrrole within the polythiophene structure. Cyclic voltammetry, UV−vis spectroscopy and impedance measurements show that the polypyrrole chains are interwoven with the polythiophene chains in a polymeric composite with a pyrrole:thiophene ratio close to 1.
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Zotti et al. (1998) studied this question.
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