Abstract:

Moleculary imprinted polymeric microspheres(MIPMs) based on 5-(4-methyl acryloyl oxygen phenyl)-10,15,20-triphenyl zinc porphyrin(ZnMOTPP) and 5-(4-methyl acryloyl oxygen phenyl)-10,15,20-triphenyl gadolinium porphyrin(GdMOTPP) were prepared with dimethyl methyl phosphonate(DMMP) as template and methacrylic acid(MAA) as auxiliary function monomer, including MIPMs-Zn+MAA, MIPMs-Gd+MAA and MIPMs-MAA. Scanning electron microscopy(SEM) images showed that the average particle size was between 50—100 μm and the particle size was uniform. Comparative study of adsorption and specificity showed that the adsorption capacity of MIPMs-Zn+MAA was superior to that of MIPMs-Gd+MAA. The adsorption capacities of MIPMs-Zn+MAA and MIPMs-Gd+MAA were much greater than that of MIPMs-MAA. MIPMs also showed better selectivity for DMMP through the isotherm binding test of diomethoate and phorate. By Scatchard analysis, the data of equilibrium adsorption experiment displayed that the MIPMs-DMMP only had one affinity binding site. The maximum absorption quantities of MIPMs-Zn+MAA, MIPMs-Gd+MAA and MIPMs-MAA were 148, 78.9 and 13.57 μmol/g, respectively.

Key words: Molecularly imprinted polymer microsphere(MIPM), Metalloporphyrin, Dimethyl methyl phosphonate(DMMP)