PHOTOELECTRICAL PROPERTIES OF SUBSTITUTED POLYACETYLENES

Three new polymers, poly(m-iodophenylacetylene), poly(p-iodophenylacet ylene) and poly[p-(triisopropylsilylethynyl)phenylacetylene], were pre pared and their photoelectrical properties were studied, The experimen tal results suggest that the photogeneration of charge carriers in the se polymers proceeds via the creation of intermediate Coulomb force bo und charge pairs and their subsequent dissociation in the external ele ctric field by the Onsager mechanism. The electron-withdrawing and ele ctron-donating groups attached to the phenyl ring were found to influe nce the photogeneration process substantially.