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Two types of Mo containing metal-organic frameworks,denoted as Mo@COMOC-4 and PMA@MIL-101(Cr),were synthesized respectively by a post-synthetic modification and a ship-in-bottle approach.The catalytic performance of both compounds in the epoxidation of propylene using cumene hydroperoxide(CHP) as oxidant was compared with MoO_3@SiO_2.A higher conversion(46.2%) and efficiency(87.4%) of CHP was observed for Mo@COMOC-4,whereas the heteropoly acids supported MIL-101 resulted in the decomposition of CHP due to its strong acidic character.Regenerability tests demonstrated that Mo@COMOC-4 could be reused for multiple runs without significant loss in both activity and stability.
Two types of Mo containing metal-organic frameworks, denoted as Mo @ COMOC-4 and PMA @ MIL-101 (Cr), were synthesized respectively by a post-synthetic modification and a ship-in-bottle approach. Catalytic performance of both compounds in the epoxidation of propylene using cumene hydroperoxide (CHP) as oxidant was compared with MoO_3@SiO_2.A higher conversion (46.2%) and efficiency (87.4%) of CHP was observed for Mo @ COMOC-4, MIL-101 resulted in the decomposition of CHP due to its strong acidic character. Regenerability tests demonstrated that Mo @ COMOC-4 could be reused for multiple runs without significant loss in both activity and stability.