Synthesis of Polyanilines Bearing Optically Active Substituents

Summary: Optically active polyanilines were prepared by an interfacial polymerization with (NH4)2S2O8 in a water/perchloric acid/chloroform system. The pristine polymer obtained in this way is in the oxidized (doped) form. The polymers display the mirror‐image Cotton effect. The doping process in solution allows a change in the circular dichroism of the polymer. The procedure has great potential in the improved preparation of durable optoelectrical devices based on the good film‐forming properties of chiral polymers. CD spectra of R‐P2 (solid line) and S‐P2 (dashed line) in 4.0 × 10−4 M THF solution. magnified image CD spectra of R‐P2 (solid line) and S‐P2 (dashed line) in 4.0 × 10−4 M THF solution.