Preparation of novel ion imprinted polymers for the selective recognition of some ions.

Abstract

An ion imprinted polymer for Ni(II) was synthesized by the trapping method and bulk polymerization based on dimethyl glyoxime as a chelating ligand [(Ni(II)-(DMG)2),IIP]. The structures and the properties of the ion imprinted and non-imprinted polymers were explored using various physicochemical characterization techniques. These included, Fourier transform Infra-Red spectroscopy (FTIR), scanning electron microscopy (SEM). The [(Ni(II)-(DMG)2),IIP] with optimized molar ratio of monomer to cross-linker to 2,2'-azobisisobutyronitrile (AIBN) initiator to porogen and template to ligand was studied for effects of pH, mass, contact time to uniformly design an experimental method. The optimum parameters were: IIP mass, 50 mg; pH, 9.0; and contact time, 10 min. The best ratios of cross-linker to monomer, monomer to template and (NiSO4.6H2O) to 4-vinylpyridine (4-VP)