Regiospecific Copolyanilines from Substituted Oligoanilines: Electrochemical Comparisons with Random Copolyanilines

Regiospecific substituted polyanilines were prepd. via electropolymn. of methoxy-substituted dimeric and trimeric oligoanilines. The oligoaniline monomers were synthesized utilizing Pd-catalyzed aryl amination cross-coupling chem. The single-crystal x-ray structure of one of the oligomers is presented. The oligoaniline monomers were electropolymd. in 1 M H2SO4, and the electrochem. behavior and potential-dependent in situ cond. of the regiospecific polyaniline films was compared to that of random copolymers obtained from solns. of aniline and o-anisidine of the same molar ratio. The regiospecific polyanilines exhibited higher cond., which may be attributed to a more cryst. and regular structure. Differences in the oxidn. potential of the polymers are obsd. depending on the degree of methoxy substitution. [on SciFinder(R)]