Structural, morphological and spectroelectrochemical characterization of poly (2-ethyl aniline)

In this paper a comparative study of the structure, morphology, and the spe ctroelectrochemical response of poly (2-ethyl aniline) and polyaniline for different counterions is presented. Spongeous structure of poly (2-ethyl an iline) is obtained when mineral acids are used, while homogeneous and compa ct films are formed using organic acids. The electrochemical response of po ly (2-ethyl aniline) depends on the charge/size ratio of the counterion due to both steric and electronic effects. The correlation between the absorpt ion bands and the redox couple show that the changes in absorbance are prop ortional to the faradaic current observed in the voltammograms.