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supporting h5[pmo10v2o40] and h5 [pw10v2o40] heteropolyacids onto the surface of amine-functionalized boehmite nano-particles for catalytic epoxidation of alkenes
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نویسنده
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jamali mojgan ,mirzaee mahdi ,mohammadi zonouz farrokhzad
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منبع
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inorganic chemistry research - 2020 - دوره : 4 - شماره : 2 - صفحه:201 -212
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چکیده
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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 min. 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.
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کلیدواژه
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boehmite nanoparticles (bnp) ,keggine type heteropolyacids (hpa) ,h5[pmo10v2o40] ,h5[pw10v2o40]
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آدرس
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shahrood university of technology, faculty of chemistry, iran, shahrood university of technology, faculty of chemistry, iran, hakim sabzevari university, department of chemistry, iran
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پست الکترونیکی
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f.zonoz@hsu.ac.ir
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Authors
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