PORPHYRIN ARRAYS CONNECTED WITH MOLECULAR WIRE

One-dimensional phosphorus (V) porphyrin arrays, P (V) porphyrin array s, connected with various lengths of either conducting or insulating m olecular wire toward the axial direction or the lateral direction of t he porphyrin ring were synthesized. In the porphyrin arrays connected with conducting wires, the P(V) porphyrin unit tending to be an electr on acceptor acted as a photoinduced hole generator, and the conducting wire, the oligothienyl moiety, tending to be an electron donor was ab le to transfer the positive hole just as molecular electric wire. The conductivity of these donor-acceptor polymers was strongly enhanced by the photoirradiation, indicating that the photoinduced carrier format ion and transfer occur efficiently along the polymeric chain, which su ggests an effective photoswitching. On the other hand, in one-dimensio nal P(V) porphyrin arrays connected with insulating wire, the photoexc ited state was localized in an inner porphyrin moiety, which suggests a photo-information storage. A combination of these P(V) porphyrin arr ay structures leads to a photocontrolling high-speed information trans duction and an artificial photo neuron.