Functionalized SBA-15 and its catalytic applications in selective organic transformations

TitleFunctionalized SBA-15 and its catalytic applications in selective organic transformations
Publication TypeJournal Article
Year of Publication2008
AuthorsSrinivas, D, Saikia, L
JournalCatalysis Surveys from Asia
Volume12
Issue2
Pagination114-130
Date PublishedJUN
Type of ArticleArticle
ISSN1571-1013
Keywordsgrafted 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.

DOI10.1007/s10563-008-9044-6
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)2.038
Divison category: 
Catalysis and Inorganic Chemistry