Preliminary Investigation of Aniline Oxidation in Nitrobenzene at Different Electrode Materials
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1995-06
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Abstract
The voltammetric behavior of aniline and anilinium ion has been studied in
nitrobenzene as a solvent. T etrabutyl ammonium perchlorate served as a supporting
electrolyte in all experiments.
In the presence of anilinium ion a cathodic current is observed at about zero Volt,
which we believe is due to the reduction of the proton of the anilinium cation. The
anodic oxidation of aniline is indicated by a sharp increase in current at about 1 V.
The current peak obtained in the first cycle decreases in intensity and at the same
time shifts to more positive potentials in the course of successive cycles. At negative
potential scans several reduction peaks are observed. A deposit is formed at the
electrode which exhibits electrochromic behavior ( blue in the oxidized state and
colorless in the reduced state.
The deposit has been investigated in sulfuric acid and exhibits a voltammetric
behavior similar to polyaniline obtained from aqueous acidic solutions.
The results of our investigation show the possibility to obtain polyaniline using aprotic
solvent like nitrobenzene.
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Aniline and Anilinium