SPECTROSCOPIC STUDIES OF SOLUBLE POLY(N-ALKYL ANILINES) IN SOLUTION AND IN CASTED FILMS

Absorption spectra for poly(N-alkylanilines), prepared in perchloric acid, in acetonitrile solution and in the form of thin films casted on ITO from acetonitrile solution, are presented and compared. Spectroelectrochemical studies of poly(N-alkylanilines) in the form of casted films and in acetonitrile solution were also performed. The casted polymers films on ITO dipped in 1 M perchloric acid reversibly changed their colors from pale yellow to green to deep blue when the applied potentials were varied between 0.0 and 1.0 V vs. Ag/AgCl reference electrode. Similar results were obtained when solutions of poly(N-alkylanilines) in acetonitrile were polarized between 0.0 and 1.0 V. The electronic structures of poly(N-alkylanilines) are discussed.