APPROACHES TO CONDUCTING POLYMER DEVICES WITH NANO-STRUCTURE - ELECTROCHEMICAL CONSTRUCTION OF ONE-DIMENSIONAL AND 2-DIMENSIONAL PORPHYRIN-OLIGOTHIOPHENE COPOLYMERS

Nano-fabrication of conducting materials is an important subject for t he construction of molecular electronic devices. We have reported the construction of highly ordered conducting polymers with tailor-made ul trafine nano-structure [1,2]. In this paper, we report the constructio n of sequentially ordered one- or two-dimensional metalloporphyrin pol ymers connected by oligothiophene bridges. One-dimensional phosphorus( V)porphyrin polymers linked with the various length of oligothienyl mo lecular wire toward the axial direction of the porphyrin ring were syn thesized by the electrochemical polymerization of symmetrical phosphor us(V)porphyrin triads with two oligothienyl axial groups. The conducti vity of the polymers was strongly enhanced by the photoirradiation, in dicating that the photoinduced carrier formation. Two-dimensional meta lloporphyrin polymers containing oligothienyl bridges were also prepar ed by the electrochemical oxidation of meso-tetrakis(oligothienyl)porp hyrin metal complexes and fabricated as layered organic diode.