Registration of the conductance after the end of the electrochemical polymerization of 3-methylthiophene (PMT) indicated a large conductance increase at open circuit. Further in situ conductance measurements with the polymeric film in Bu4NPF6/acetonitrile base solution provided direct evidence for that - after the oxidation of the film - the final achievement, the accomplishment of the state of high conduction is not necessarily coupled with current flow any more. The non-faradaic step which may explain this observation is described as a chemical reorganization within the film, which involves the transformation of solvated polymer segments to a more conjugated, non-solvated form.
ASJC Scopus subject areas
- Chemical Engineering(all)