Highly efficient and excellent reusable catalysts of molybdenum(VI) complexes grafted on ZPS-PVPA for epoxidation of olefins with tert-BuOOH

摘要

Four new kinds of heterogeneous catalysts for olefins epoxidation were obtained by grafting diamines on organic polymer–inorganic hybrid material, zirconium poly (styrene-phenylvinylphosphonate)-phosphate (ZPS-PVPA), and subsequently coordinating with Schiff base Mo(VI) complexes. The catalysts were characterized by IR, XPS, SEM and TEM. All catalysts were evaluated through the epoxidation of olefins using tert-BuOOH as oxidant. The heterogeneous catalysts possess the advantages of high conversion, selectivity and excellent reusability. The catalysts were easily separated from the reaction systems and could be reused 13 times without significant loss of catalytic activity. Copyright ? 2010 John Wiley & Sons, Ltd.