Preparation, Characterization Of Polymer-bound Metal Complexes Containing Nitrogen And Application In Organic Synthesis

A series of functionalized polystyrene-divinylbenzene ligands containing N atom were synthesized by incorporating ethanolamine, 2-mercaptoethylamine (MEA), iminodiacetic acid (IDA), 8-quinolinol and anthranilic acid into chloromethylated polystyrene-divinyl benzene (CPS), and a cross-linked polyacrylamide (PAM) resin was synthesized by means of solution polymerization and inverse suspension polymerization. All these polymer ligands were treated with FeCI3- 6H2O, CuCl2- 2H2O, CoCl2- 6H2O and NiCI2-6H2O aqueous solution to form the metal complex on the surface. Conversion of functional groups of the CPS resin was confirmed by FT-IR spectra and elemental analysis. FT-IR and ESR were used to investigated the coordination behavior of these polymer ligands. The metal content of these metal complexes was estimated by atomic absorption spectroscopy. The thermal stability of them was seen by TGA. By catalyzing the acetalization of carbonyl compounds and the oxidation of alcohols, the functionalized polystyrene-divinylbenzene metal complexes were found to be effective for acetalization, especially the CPS-HNCH2CH2OH-Fe (III) could catalyze the acetalization of cyclohexanone and ethane-1, 2-diol with high yield 93%, moreover, the catalyst could be reused with no substantial loss of activity for up to ten cycles and this type of catalyst can also be used to catalyze the oxidation of benzyl alcohol. But the metal complex of (PAM) can catalyze the acetalization of cyclohexanone and ethane-1, 2-diol with low conversion and yields.