通过表面有机金属化学将钼氧烷基配合物负载在二氧化硅上：一种高活性的烯烃复分解前催化剂。
Well-Defined Molybdenum Oxo Alkyl Complex Supported on Silica by Surface Organometallic Chemistry: A Highly Active Olefin Metathesis Precatalyst.
机构信息
Laboratoire de Chimie, Catalyse, Polymères et Procédés, UMR 5265 CNRS/ESCPE-Lyon/UCBL, ESCPE Lyon, F-308-43, Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France.
Physical Sciences and Engineering, KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST) , Thuwal 23955-6900, Saudi Arabia.
出版信息
J Am Chem Soc. 2017 Feb 15;139(6):2144-2147. doi: 10.1021/jacs.6b11220. Epub 2017 Feb 6.
The well-defined silica-supported molybdenum oxo alkyl species (≡SiO-)MoO(CHBu) was selectively prepared by grafting of MoO(CHBu)Cl onto partially dehydroxylated silica (silica) using the surface organometallic chemistry approach. This surface species was fully characterized by elemental analysis and DRIFT, solid-state NMR, and EXAFS spectroscopy. This new material is related to the active species of industrial supported MoO/SiO olefin metathesis catalysts. It displays very high activity in propene self-metathesis at mild (turnover number = 90 000 after 25 h). Remarkably, its catalytic performance outpaces those of the parent imido derivative and its tungsten oxo analogue.
通过采用表面有机金属化学方法，将 MoO(CHBu)Cl 接枝到部分脱羟的硅石（silica）上，选择性地制备了结构明确的硅烷支撑的钼氧烷基物种（≡SiO-）MoO(CHBu)。通过元素分析、DRIFT、固态 NMR 和 EXAFS 光谱对这种表面物种进行了充分的表征。这种新材料与工业负载 MoO/SiO 烯烃复分解催化剂的活性物种有关。它在温和条件下（25 小时后转化率达到 90000）下，在丙烯自复分解中表现出非常高的活性。值得注意的是，其催化性能优于母体亚氨基衍生物及其钨氧类似物。
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