title: Mechanism of dedoping processes of conducting poly(3-alkylthiophenes).
abstract: To clarify the mechanism of thermal dedoping processes of conducting poly(3-alkylthiophenes), temporal changes in electric conductivity, photoabsorption, and electron spin resonance of iodine-doped poly(3-octylthiophene) were examined. A decrease in the electric conductivity was accompanied by a decrease in the photoabsorption of the polymer cation and an increase in the spin concentration: the cation is a spinless charge carrier and it was converted to an immobile paramagnetic species. The conversion proceeds through deprotonation of the cation, which results in the formation of a polyenyl radical.
authors.affiliation: Division of Materials Chemistry, Graduate School of Engineering, Hokkaido University, Kita-ku, Sapporo 060-8628, Japan. koizumih@eng.hokudai.ac.jp
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Koizumi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Dougauchi
authors.forename: Tsuneki
authors.initials: T
authors.lastname: Ichikawa