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http://dx.doi.org/10.5012/bkcs.2012.33.8.2748

High Selective Oxidation of Alcohols Based on Trivalent Ion (Cr3+ and Co3+) Complexes Anchored on MCM-41 as Heterogeneous Catalysts  

Shojaei, Abdollah Fallah (Department of Chemistry, Faculty of Science, University of Guilan)
Rafie, Mahboubeh Delavar (Department of Chemistry, Faculty of Science, University of Guilan)
Loghmani, Mohammad Hassan (Department of Chemistry, Faculty of Science, University of Guilan)
Publication Information
Bulletin of the Korean Chemical Society / v.33, no.8, 2012 , pp. 2748-2752 More about this Journal
Abstract
Cr(III) and Co(III) complexes with acetylacetonate were anchored onto a mesoporous MCM-41 through Schiff condensation. The materials were characterized by XRD, FT-IR, BET, CHN and ICP techniques. Elemental analysis of samples revealed that one C=N bond was formed through Schiff condensation on MCM-41 surface. The catalysts were tested for the alcohol oxidations using t-butyl hydroperoxide (TBHP) and $H_2O_2$ as oxidant. The catalytic experiments were carried out at both room temperature and reflux condition. Various solvents such as dichloromethane, acetonitrile and water were examined in the oxidation of alcohols. Among the different solvents, catalytic activity is found more in acetonitrile. Further, the catalysts were recycled three times in the oxidation of alcohols and no major change in the conversion and selectivity is observed, which shows that the immobilized metal-acetylacetonate complexes are stable under the present reaction conditions.
Keywords
Alcohol oxidation; Heterogeneous catalyst; MCM-41; Trivalent ions;
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