Chinese Journal of Applied Chemistry

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Application of Heteropolyoxomolybdotungstste([Smim]3[PMoW3O24]) in Epoxidation of Cyclohexene with Urea-hydrogen Peroxide


  1. (1.Department of Chemistry,East China Normal University,Shanghai 200062,China;
    2.Institute of Rare and Scatered Elements Chemistry,Liaoning University,Shenyang 110036,China)
  • Received:2013-07-08 Revised:2013-10-13 Published:2014-03-10 Online:2014-03-10

Abstract: A molybdenum-tungsten mixed-coordinated polyoxometalate, 3-(1-heptyl-3-methyl-imidazolium) heteropolyoxomolybdotungstate [Smim]3[PMoW3O24] was synthesized and characterized. The epoxidation of alkenes was successfully catalyzed by a recyclable and environmentally benign catalytic system:[Smim]3[PMoW3O24]/UHP(urea-hydrogen peroxide)/[Smim]PF6/cyclohexene. This catalytic system not only catalyze homogeneous epoxidation of cyclohexene, but also used recyclable room temperature ionic liquid as a novel solvent instead of conventional organic reaction media. The yield could reach more than 93%. The catalyst and ionic liquid could be easily recovered and reused after the reaction.

Key words: heteropolyoxomolybdotungstate, cyclohexene, epoxidation

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