Conformation polyaniline synthesis

In general, chemical oxidation provides ICPs as powders, while electrochemical synthesis leads to films. There is recent evidence [3] in the case of polyanilines that the materials formed via the chemical and electrochemical routes have different conformations for their polymer chains. 

Q. Wu, Z. Xue, Z. Qi, E Wang, Synthesis and Characterization of PAn/Clay Nanocomposite with Extended Chain Conformation of Polyaniline. Polymer... 

The electropolymerization of o-methoxyaniline in the presence of (+)-(lS)- or (-)-(ll )-CSA yields an optically active polyaniline derivative. The polymer shows intense CD bands as a film deposited on an electrode. The polymer is soluble in NMP, CHCI3, DMF, DMSO, and MeOH, and the polymer also showed CD absorption in a solution probably based on a chiral main-chain conformation such as a helix. A film made by spin-coating a mixture of polyaniline with CSA also showed strong CD absorptions, which may be based on a helical conformation of the main chain. The electropolymerization method has been applied to the synthesis of an optically active polypyrrole which may have a helical conformation. ... 

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