Microgravimetric study of the influence of the solvent on the redox properties of polypyrrol modified electrodes

The redox behavior of the polypyrrole films in the presence of LiClO4 salt in different solvents like propylene carbonate (PC), N,N-dimetilformamide (DMF), methanol (MetOH), ethanol (EtOH), acetonitrile (ACN) and water was investigated using simultaneous electrochemical quartz crystal microbalance and cyclic voltammetry experiments. Both charge and mass changes during redox processes were rationalized in terms of multiple regression considering some solvent parameters and ionic transport characteristics. The electroactivity of PPY modified electrodes increase in the sequence PC