Electrochemistry of poly(pyrrole chloride) films: a study of polymerization efficiency, ion transport during redox and doping level assay by electrochemical quartz crystal microgravimetry, pH and ion-selective electrode measurements

This study concerns the growth, redox behavior, and analysis of poly(pyrrole chloride) films ranging in thickness from ∼0.5 to ∼1.5 μm. Changes in the electrolyte pH from radical-coupling reactions during the oxidation of pyrrole lead to estimates of the polymerization efficiency in 0.1 M KCl which vary from 82% to 92% depending on the charge consumed. These values are compared with the Coulombic efficiency computed earlier in this laboratory using electrochemical quartz crystal microgravimetry (EQCM)