SN‐conducting polymers with heterocyclic spacer groups

Abstract

AbstractPolymer‐containing alternating sulfur nitrogen moieties separated by heterocyclic groups have been synthesized and characterized. The polymers have undoped conductivities of 10−6 to 10−9 (Ω cm)−1; the intrinsic carriers are negatively charged as shown by thermopower coefficient of −1.4 × 103 to −1.9 × 103 μV K−1. The polymers are degraded by AsF5 and cannot be doped by iodine. Exposure to bromine resulted in reversible p‐doping of the SN polymers to the thermopower values of +400 to +820 μV K−1 and conductivities of 0.01 to 0.002 (Ω cm)−1. Removal of dopant by evacuation returns most of the properties of the polymers to the undoped states. Magnetic properties of the materials have been studied.