Journal of Electroanalytical Chemistry, Vol.471, No.2, 180-189, 1999
Electropolymerization of 2-methoxy aniline. Electrochemical and spectroscopical product characterization
Poly(2-methoxyaniline) (PMOA) was electrosynthesized with varying monomer concentrations in 1 M HClO4. The polymers obtained were characterized using cyclic voltammetry, Fourier transform IR diffuse reflectance spectroscopy (FTIR-DRS), W-vis spectroscopy and electrochemical impedance. At relatively high monomer concentrations (>20 mM), the polymer obtained is similar to aryl amine conducting polymers, but shows in its voltammogram an intermediate peak, which becomes larger as the monomer concentration decreases. For monomer concentrations below similar to 20 mM, the polymer becomes more resistive, behaving similarly to aryl amine redox polymers. The different techniques employed show results consistent with the voltammetric experiments. This change of behaviour indicates that different polymers are obtained as the monomer concentration is modified.
Keywords:REDOX POLYMER ELECTRODES;THIN-LAYER CELLS;POLYANILINE FILMS;CONDUCTIVE POLYMERS;SUBSTITUTED POLYANILINES;CYCLICVOLTAMMETRY;O-PHENYLENEDIAMINE;ORTHO-AMINOPHENOL;BEHAVIOR;IMPEDANCE