Immobilization of metalloporphyrin on functionalized nanoporous silica

Abstract

SBA-15 nanoporous silica were prepared cooperation assembly of tetraethylorthosilicate precursor in the presence of poly (ethylene glycol)–block- poly (propylene glycol)–block- poly (ethylene glycol) copolymer surfactant and functionalized with (3-aminopropyl) triethoxysilane (APTES) via sol-gel reaction to obtain APTES-SBA-15. Tetra-(p-chlorophenyl) porphyrin (TClPP) was synthesized using slightly modified Alder- Longo method and zinc(II) was inserted into the TClPP using zinc acetate as source of zinc. The existance of zinc metal in porphyrin was confirmed by the appearance of Soret band and Q band in UV- vis spectra. Zn(II)-TClPP was also characterized using FTIR and NMR spectroscopy .With the aid of amino functionalized on surface of SBA-15, it can be used as support for immobilization of metalloporphyrin producing APTES-SBA-15-Zn(II)-TClPP that can used as heterogenous catalysis in various reactions. The formation of this material was confirmed by characterization by using FTIR spectroscopy, XRD and BET adsorption.