Conducting Electronic Polymers by Non-Redox Processes
Abstract
A model describing the dependence of the protonation and oxidation state has been derived. It is assumed that amine and imine sites do not function independently. Predictions are compared with previous experimental data. Redox titration results and electronic spectral evidence show that the oxidation state of the emeraldine base form of polyaniline can vary depending on whether its synthesis is performed in the presence or absence of air. Chemical doping of leucoemeraldine, the completely reduced form of polyaniline, to selected oxidation states can be accomplished by a variety of oxidizing agents such as C12, (NO)+(PF6)-, FeC13, SnC14 and TCNQ. Poly(o-methylaniline) and poly(o- ethylaniline) have been synthesized by chemical as well as electrochemical methods from the corresponding monomers. The polymers were characterized by elemental analysis, UV-visible spectroscopy and cyclic voltammetry. Upon treatment with 1M HC1, the conductivity of the polymers increased from approx 10 to the -8th S/cm to approx. .1 S/cm for poly(o-methylaniline) and to approx 10 to the -3 S/cm for poly(o-ethylaniline).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1988
- Accession Number
- ADA205553
Entities
People
- Alan G. Macdiarmid
Organizations
- University of Pennsylvania