We have prepared a novel Ru-mononer complexsupported on a SiO(2) surface by using a Ru-monomer complex precursor with a p-cymene ligand, which was found to be highly active for the selectiveoxidation of aldehydes and the epoxidation of alkenes using O(2). The structure of the supported Ru catalyst was characterized by means of FT-IR, solid-state NMR, diffuse-reflectance UV/vis, XPS, Ru K-edge EXAFS
Selective Formation of a Coordinatively Unsaturated Metal Complex at a Surface: A SiO2-Immobilized, Three-Coordinate Ruthenium Catalyst for Alkene Epoxidation
specificity of the catalyst for diaryl ketones has been confirmed in a reaction with a bifunctional substrate, 4-acetyl-benzophenone; the diaryl ketone was reduced faster with the imprinted catalyst than the acetyl group. The opposite regioselectivity was observed with the control polymer. Both the activity and the selectivity of the imprinted catalysts are dependent on how the ruthenium complexes are attached
Sulfoxidation on a SiO2-supported Ru complex using O2/aldehyde system
作者:Niladri Maity、Chularat Wattanakit、Satoshi Muratsugu、Nozomu Ishiguro、Yong Yang、Shin-ichi Ohkoshi、Mizuki Tada
DOI:10.1039/c2dt12133f
日期:——
A site-isolated SiO2-supported Ru-monomer complex, whose structure was characterized by means of solid-state NMR, XPS, UV/vis, and Ru K-edge EXAFS, was found to be efficient for sulfoxidation using an O2/aldehyde system. Significant enhancement of sulfoxidation rates was observed on the SiO2-supported Ru complex for various sulfide derivatives.