ONE-DIMENSIONAL DONOR-ACCEPTOR POLYMER - PHOSPHORUS PORPHYRINS LINKEDWITH MOLECULAR WIRE

One-dimensional phosphorus(V)porphyrin polymers linked with the variou s length of oligothienyl molecular wire toward the axial direction of the porphyrin ring were synthesized by the electrochemical polymerizat ion of symmetrical phosphorus(V)porphyrin triads with two oligothienyl axial groups. In the polymers, the phosphorus(V)porphyrin unit tendin g to be an electron acceptor acted as a photoinduced hole generator, a nd the oligothienyl moiety tending to be an electron donor was able to transfer the positive hole just as molecular electric wire. The condu ctivity of these donor-acceptor polymers was strongly enhanced by the photoirradiation, indicating that the photoinduced carrier formation a nd transfer occurs efficiently along the polymeric chain.