Metal oxide-triazole hybrids as heterogeneous or reaction-induced self-separating catalysts
作者:Tatiana R. Amarante、Patrícia Neves、Anabela A. Valente、Filipe A. Almeida Paz、Martyn Pillinger、Isabel S. Gonçalves
DOI:10.1016/j.jcat.2016.06.005
日期:2016.8
catalysts for oxidation reactions with alcohol, aldehyde, olefin and sulfide substrates, and are more effective with hydrogen peroxide as the oxidant than with tert-butylhydroperoxide. The MoVI hybrid 1 transforms into soluble active species during cis-cyclooctene epoxidation with H2O2. When consumption of H2O2 reaches completion, spontaneous reassembly of the 2-dimensional molybdenum oxide network of 1 takes
水热合成杂化金属氧化物-三唑材料[MoO 3(trz)0.5 ](1)和[W 2 O 6(trz)](2)(trz = 1,2,4-三唑),其特征在于技术(TGA,SEM,1 H和13 C MAS NMR,FT-IR光谱以及通过Rietveld分析高分辨率同步加速器粉末XRD数据进行结构确定)。当材料1和2用作与酒精,醛,烯烃和硫化物底物进行氧化反应的催化剂时,表现出不同的行为,并且过氧化氢作为氧化剂比叔丁基更有效丁基过氧化氢。Mo VI杂化物1在H 2 O 2的顺式-环辛烯环氧化过程中转变为可溶性活性物质。当H 2 O 2的消耗完全完成时,二维氧化钼网络1的自发重组,杂化物以微晶固体形式沉淀,可以轻松分离和回收。1 H 2 O 2和其他底物(例如油酸甲酯和甲基苯硫醚)会发生反应诱导的自分离行为。W VI Hybrid 2 行为不同,在整个非均相催化过程中保留其结构特征。