In this thesis, B-type sandwich polyoxometalate of [(PW9O34)2Fe4(H2O)2]6- was immobilized into porous composite cavities of Cr-MIL-101 by simple anion exchange. The formation of P2W18Fe4@MIL-101 nanocomposite was confirmed by FT-IR, TGA, BET, SEM, EDX, ICP, BET and powdery XRD methods. The catalytic activity of nanocomposites was investigated in oxidation of sulfides to sulfons with H2O2 at room temperature. The effect of temperature on stability and catalytic activity of the P2W18Y3@MIL-101 was investigated. The effects of different dosages of catalyst, type of solvent, reaction time, amount of oxidant in this catalytic system were investigated. The new P2W18Fe4@MIL-101 nanocomposite exhibited well recyclability and reusability in at least five consecutive reaction cycles without significant loss of activity or selectivity.
