Functionalized SBA-15 and its catalytic applications in selective organic transformations
Title | Functionalized SBA-15 and its catalytic applications in selective organic transformations |
Publication Type | Journal Article |
Year of Publication | 2008 |
Authors | Srinivas, D, Saikia, L |
Journal | Catalysis Surveys from Asia |
Volume | 12 |
Issue | 2 |
Pagination | 114-130 |
Date Published | JUN |
Type of Article | Article |
ISSN | 1571-1013 |
Keywords | grafted Mn-Salen complexes, Ordered mesoporous silica, organofunctionalized SBA-15, oxidation catalysts, Oxyhalogenation of aromatics |
Abstract | Ordered, mesoporous SBA-15 functionalized with organic and inorganic moieties exhibits efficient catalytic activity in a variety of organic transformations. In this account, reviewing our own work, three-sets of surface-modified SBA-15 materials have been investigated. The first-set of materials consists of SBA-15 modified with organo-acidic (propyl thiol and propyl sulfonic acid) and basic (propyl amine and propyl adenine) moieties. The second-set of materials was prepared by grafting Mn complexes to the organo-functionalized SBA-15. The third-set composes of nanocrystalline metal oxides supported on SBA-15. All these catalysts have been characterized by structural and spectroscopic techniques. Catalytic activities of the first-set of solid materials have been investigated in acid/base-catalyzed reactions viz., ring-opening of epoxides with amines (producing beta-amino alcohols), esterification, three-component-Mannich reactions and cycloaddition of CO(2) to epoxides. The Mn complexes grafted on organofunctionalized SBA-15 are efficient catalysts for the chemo-, regio- and stereoselective aerial oxidation of monoterpenes at ambient conditions. TiO(x), VO(x), MoO(x) and WO(x) supported on SBA-15 catalyzed biomimetic oxyhalogenation of aromatic compounds. In all these reactions, the functionalized SBA-15 showed high selectivity. |
DOI | 10.1007/s10563-008-9044-6 |
Type of Journal (Indian or Foreign) | Foreign |
Impact Factor (IF) | 2.038 |