MORPHOLOGICAL PROPERTIES AND PHOTOCONDUCTIVITY OF SELF-ASSEMBLED Sn/Co PORPHYRIN NANOSTRUCTURES

In this study the synthesis and characterization of meso-substituted Sn and Co porphyrin nanostructures were carried out. The effect of pH of medium on the formation of Sn/Co porphyrin nanostructures was studied. The formation process is caused by the net charge on the porphyrin, which is controlled by protonation/deprotonation of the oppositely charged periphery. This charge determines also stoichiometric ratios of porphyrins in the nanostructures. It was found that the contact of the donor (Co-porphyrin) with acceptor (Sn-porphyrin) provides photoconductivity of nanostructures under illumination with visible light. It was shown that the increase of temperature decreases their conductance both in the dark and under illumination.