Porphyrin sheet polymer and their complexes: I-Synthesis and properties of polymeric tetrakisphenylporphyrin films cross-linked by terephthalate

Abstract

Porphyrin sheet polymer has been prepared by interfacial polymerization of reactive monomers, namely, terephthalyl chloride and tetrakis-(4-hydroxyphenyl) porphyrin (THPP). The thin polymeric film (H₂PTBCOPP) is insoluble in water and in some organic solvents such as ethanol, acetone, chloroform and hexane and slightly soluble in DMF, THF or pyridine. Its complexes (MPTBCOPP) with metals have been obtained by reaction of the polymeric ligand (H₂PTBCOPP) with MAc₂.nH₂O (M=Cu¹¹, Co¹¹, Zn¹¹). The visible, IR and fluorescence spectra show that the polymerization has been accomplished and transition metals have reacted with the polymer. The scanning electron micrographs show that the films have two-dimensional structure. The doped H₂PTBCOPP and MPTBCOPP (M = Cu, Co, Zn) are semiconducting polymers with electrical conductivity of 4.63 x 10^-6~ 4.83 x 10^-4S cm^-¹ at room temperature and are stable in air.