The redox and spectroscopic properties of soluble poly- (9-decylcarbazole) derivatives and poly(1-decylpyrrole) were studied. The polymers were synthesized via the Yamamoto polycondensation method. Analyzing the electrochemical and optical properties of 3,6-linked poly(alkylcarbazole)s it is evident that the conjugation segment is the benzidine system and the overall properties of these polymers can be compared with meta linked poly(phenylene)s. In opposite, 2,7-linked poly(alkylcarbazole)s reveal an even longer conjugation segment comparable with para linked poly(phenylene)s. First observations in the case of poly(1-decylpyrrole) suggest a higher steric hinderance compared to poly- (1-methylpyrrole). Molecular modeling studies confirm this.
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Geißler et al. (1997) studied this question.