A facile method for promoting activities of vanadium–schiffbase complex anchored on organically modified MCM-41 in epoxidation reaction
作者： K.M. Parida , Sudarshan Singha , P.C. Sahoo
DOI: 10.1016/J.MOLCATA.2010.03.028
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摘要: Abstract An organic–inorganic hybrid heterogeneous catalyst (V-MCM-41) was synthesized by anchoring vanadium–schiffbase complex on chloropropyl modified mesoporous silica (CP-MCM-41). Characterization of the functionalized ordered two-dimensional material powder X-ray diffraction (XRD), N2 adsorption–desorption, CP-MAS NMR spectroscopy (13C and 29Si), Fourier transform infrared (FT-IR), diffuse-reflectance UV–vis spectroscopy, demonstrate successful grafting vanadium into silica. It is also observed that mesostructure has not been destroyed in multistep synthetic procedure. We have performed epoxidation reaction various olefins using V-MCM-41 as catalyst, hydrogen peroxide oxidant sodium bicarbonate co-catalyst acetonitrile solvent. The enhances rate many folds. requires minimum amount H2O2, short time period most importantly occurs at room temperature. can be recovered easily reused times without significant loss catalytic activity selectivity.
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