Journal of Catalysis ( IF 6.5 ) Pub Date : 2020-12-15 , DOI: 10.1016/j.jcat.2020.12.003 Yang Zhang , Yuanling Huo , Kang Tang , Wen Xu , Xinqing Lu , Rui Ma , Yanghe Fu , Weidong Zhu
Although stannosilicate zeolites are active and selective in Baeyer–Villiger (B-V) oxidation because of their unique Lewis acidity, which is useful to activate the carbonyl group of ketone rather than peroxide, the role of their pore-opening structure and hydrophobicity in selective oxidation still needs to be explored. In the present work, stannosilicate zeolites with different topologies were synthesized and characterized in detail, especially in terms of the coordination states of the Sn species in the isomorphically substituted Sn zeolite Sn-MSE (Sn-MCM-68). The catalytic properties of the synthesized zeolites were evaluated in B-V oxidation. The results show that Sn-MCM-68 possesses some superior catalytic properties in B-V oxidation in comparison with other zeolites, because of its three-dimensional 12 × 10 × 10-membered ring (MR) pore-opening channels and relatively higher hydrophobicity.
中文翻译:
锡硅酸盐沸石的开孔结构和疏水性在Baeyer-Villiger氧化中的作用
尽管锡硅酸盐沸石因其独特的路易斯酸度而在拜尔-维利格(BV)氧化中具有活性和选择性,可用于活化酮的羰基而不是过氧化物,但它们的开孔结构和疏水性在选择性氧化中的作用仍然需要探索。在目前的工作中,合成并详细描述了具有不同拓扑结构的锡硅酸盐沸石,特别是根据同构取代的Sn沸石Sn-MSE(Sn-MCM-68)中Sn物种的配位态。在BV氧化中评估了合成沸石的催化性能。结果表明,与其他沸石相比,Sn-MCM-68在BV氧化中具有一些优异的催化性能,