Inorganic Chemistry Research
Supporting H5[PMo10V2O40] and H5[PW10V2O40] Heteropolyacids onto the Surface of Amine-functionalized Boehmite Nano-particles for Catalytic Epoxidation of Alkenes
Document Type : Research Paper
Authors
1 Faculty of Chemistry, Shahrood University of Technology, Shahrood, Iran
2 Department of Chemistry, Faculty of Science, Hakim Sabzevari University
Abstract
Boehmite nanoparticles were covalently functionalized by 3-(trimethoxysilyl)-propylamine to support H5[PMo10V2O40] and H5[PW10V2O40] Keggin type heteropolyacids. After characterizing these catalysts by FT-IR, PXRD, TG/DTA, CHN, ICP, and TEM techniques, they were applied to the epoxidation of cis-cyclooctene. The progress of the reactions was investigated by gas-liquid chromatography and the catalytic procedures were optimized for the parameters involved, such as the solvent and oxidant. The results showed that 20 mg of supported H5[PMo10V2O40] catalyst in 2 ml C2H4Cl2 with 0.5 mmol cyclooctene and 1 mmol tert-butyl hydroperoxide at reflux temperature gave 98% yield over 60 minutes. Recycling experiments revealed that these nanocatalysts could be repeatedly applied up to four times for a nearly complete epoxidation of cis-cyclooctene. The optimized experimental conditions were also used successfully for the epoxidation of some other alkenes such as cyclohexene, styrene and α-methyl styrene.
Keywords
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Volume 4, Issue 2
Autumn and Winter 2020Pages 201-212
- Receive Date: 16 July 2020
- Revise Date: 06 September 2020
- Accept Date: 08 September 2020
- First Publish Date: 01 December 2020