应用化学

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磷钼钨杂多酸[Smim]3[PMoW3O24]/过氧化脲在环己烯环氧化反应中的应用

王晗1,2,杨云琴2,房大维2,臧树良1,2*   

  • 收稿日期:2013-07-08 修回日期:2013-10-13 出版日期:2014-03-10 发布日期:2014-03-10
  • 通讯作者: 臧树良,教授; Tel/Fax:024-62202006; E-mail:slzang@lnu.edu.cn; 研究方向:稀散元素催化化学
  • 基金资助:
    国家自然科学基金(21071073,21373005)国家科技支撑计划(2012BAF03B02)和辽宁省自然科学基金(201202084)资助项目

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

摘要: 合成了一种含钼钨的杂多酸[Smim]3[PMoW3O24](Smim:1-庚基-3-甲基咪唑),并对其进行了表征,以此为催化剂设计了一种可循环且环境友好的催化体系:[Smim]3[PMoW3O24]/UHP(过氧化脲)/[Smim]PF6/环己烯。 此体系不仅可以催化环己烯环氧化反应达到较好效果,而且避免了传统有机溶剂的使用,且使反应在均相体系中进行,产率可达到93%以上,而且溶剂和催化剂可以循环使用。

关键词: 磷钼钨杂多酸, 环己烯, 环氧化

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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