Electrodissolution of poly (2,5-di-(2-thienyl)-pyrrole) in orgnaic and hydro-organic media

摘要

Oxidized poly(2,5-di-(2-thienyl)-pyrrole) (poly (SNS)) films on Pt were reduced in common organic solvents under chronopotentiometric conditions. electrodissolution was observed during reduction, being followed by ultramicrogravimetry. Thin films give an overall electro-dissolution in 0.1 M LiClO_4 + acetonitrile solutions. The ratio between charges consumed during polyme stripping and those spent for its electrogeneration was 0.22-0.28. Between 0.24 and 0.34 electrons per monomeric unit were found to be required to electrodissolve the polymer. The electroeduction of oxidized poly (SNS) was also studied in aqueous mixtures of DMF, acetonitrile, acetone or methanol, containing 0.1 M LiClO_4. In the water-rich regions, a constant weight loss of about 20