一个有机咪唑功能化多钼氧簇的合成及其选择性氧化硫化物

An Organic Imidazole Functionalized Polyoxomolybdenum Cluster:Synthesis and Selectivity Switch in the Oxidation of Sulfides

合成和表征一个新颖的有机咪唑功能化多钼氧簇[(aIM)2Mo8O26]·4HaIM(aIM=1-烯丙基咪唑),并通过X-单晶衍射分析、X-射线粉末衍射、红外光谱及元素分析对其结构进行了表征。该化合物晶体为单斜晶系,C2/c空间群,包括四个质子化的1-烯丙基咪唑,和一个与1-烯丙基咪唑通过Mo-N键桥连的γ-[Mo8O26]多阴离子。值得注意的是,功能化的多钼氧簇可作为硫醚氧化的催化剂,显示了有效的催化活性(选择性高达98.9%)。

A novel N-ligand 1-allylimidazole functionalized polyoxomolybdenum cluster was controllably synthesized and routinely characterized by single crystal X-ray diffraction,power X-ray diffraction,infrared spectrum and elemental analyses.The functionalized polyoxomolybdenum compound 1 formulated as[(aIM)2Mo8O26]·4HaIM(aIM=1-allylimidazole).Structural analysis shows that functionalized polyoxomolybdenum compound 1 crystallizes in the Monoclinic system,space group C2/c and it consists of four free protonated 1-allylimidazole molecules and one well-known octamolybdateγ-[Mo8O26]cluster bridged by two 1-allylimidazole ligands via two Mo-N single bonds.Remarkably,the functionalized polyoxomolybdenum compound 1 was further investigated as a catalyst in the oxidation of sulfides,and exhibited efficient catalytic activities for selective oxidation of sulfides(Sele.up to 98.9%).