Abstract
Boehmite nanoparticles with a high surface area and a high degree of surface hydroxyl groups were covalently functionalized by 3-(trimethoxysilyl)-propylamine to support vanadium-oxo-sulfate and molybdenum hexacarbonyl complexes. These supported catalysts were then characterized by Fourier-transform infrared spectroscopy, powder X-ray diffraction, thermogravimetry and differential thermal analysis, X-ray-photoelectron spectroscopy, elemental analysis, inductively coupled plasma, and transmission electron microscopy techniques. The catalysts were subsequently used for the epoxidation of cis-cyclooctene, and the experimental procedures were optimized. The progress of the reactions was investigated by gas-liquid chromatography. Recycling experiments revealed that these nanocatalysts could be repeatedly used several times for a nearly complete epoxidation of cis-cyclooctene. The optimized experimental conditions were also used successfully for the epoxidation of some other substituted alkenes.
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