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The application of zero-current potentiometry in chemical synthesis and characterization of polypyrrole using electrochemical sensors

The chemical polymerization of pyrrole to highly conducting polypyrrole in aqueous and acetonitrile solutions using various oxidizing agents was studied. The course of synthesis was followed using zero-current potentiometry with a platinum reference electrode as redox sensor. The obtained results can be used for a better understanding of pyrrole polymerization kinetics. In addition, the halogenide-ion content as counter ion can be determined potentiometrically after chemical degradation of polypyrrole using a chloride-selective electrode as sensor.

redox reactions ; ion selective electrodes ; polymer synthesis

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