III International Conference

PP-II-75CATALYTIC OXIDATION OF ORGANIC SUBSTANCES BY POLYMER-ANCHORED AMINO ACID DERIVED TRIDENTATE LIGAND COMPLEXES OFVO(IV) AND Cu(II)Maurya M.R., Kumar M.Department of chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, IndiaE-mail: manisdcy@iitr.ernet.inA synthetic strategy was developed for covalently anchored 3-formyl salicylic acid onto chloromethylated polystyrene cross- linked with 5% divinylbenzene. Treatment of thischelating resin with two amino acid, DL-alanine and L-isoleucine form a shiff-base tridentateligand (abbreviated as PS-Hfsal-ala and PS-Hsal-isol). The polymeric ligands containtridentate ONO donor sites were treated with a solution of [Cu(CH 3 COO) 2 .H 2 O],[VO(acac) 2 ], to form the corresponding metal complexes on the support. The metalcomplexes abbreviated as PS-[VO(fsal-ala)], PS-[Cu(fsal-ala)], PS-[VO(fsal-isol) and PS-[Cu(fsal-isol)]. Structure of these immobilized complexes have been established on the basisof scanning electron micrographs, spectroscopic (Infrared and electronic), thermo gravimetricand elemental analyses studies. The catalytic oxidation of p-chloro toluene and cyclohexenewere investigated using these complexes as catalyst in presence of eco friendly oxidant H 2 O 2 .Reaction conditions have been optimized by considering the concentration of oxidant, amountof catalyst, volume of solvent and temperature. Under optimized condition p-chloro toluenegives a maximum 13.34% conversion with four products, cyclohexene 98.6% conversion withfour and two product respectively. In situ neat complexes of all the metal has been prepared tocompare the spectral properties and catalytic activities. Recycling studies indicate that thecatalyst can be recycled four times without any significant loss in their catalytic potential.301