Synthesis and structural characterization of tetrakis(N-methyl-4-pyridyl) porphyrin copper into V2O5 xerogel

This paper reports on the intercalation of the cationic water-soluble tetra kis(N-methyl-4-pyridyl) porphyrin copper into V2O5 xerogel and the structur al and spectroscopic characterization of the obtained products. The prepara tion procedure is carried out to preserve the anisotropic lamellar structur e nature of the xerogel. The X-ray diffraction, FTIR, EPR, and SEM data sho w the maintenance of the matrix framework during the intercalation, which i s consistent with a topotatic reaction, and the formation of nucleation cen ters promoting the organization of polimeric chains. The results also indic ate weak interaction between the host and guest species leading to the form ation of an ordered organic-inorganic composite. (C) 2000 Elsevier Science Ltd.