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Selective functionalization of the mesopores of SBA-15

TitleSelective functionalization of the mesopores of SBA-15
Publication TypeJournal Article
Year of Publication2015
AuthorsWebb, JD, Seki, T, Goldston, JF, Pruski, M, Crudden, CM
JournalMicroporous and Mesoporous Materials
Date Published02
Type of ArticleArticle
ISBN Number1387-1811
Accession NumberWOS:000347593000015
Keywordscarrier, catalysts, drug-delivery, electroless deposition, enantioselectivity, interfacial reactions, mcm-41, mesoporous silica, molecules, organometallic, SBA-15, Selective grafting, silica nanoparticles, Silylation, Solid state NMR, solid-state nmr, Surface functionalization, system

A method has been developed that permits the highly selective functionalization of the interior and exterior surfaces of the ubiquitous mesoporous material, SBA-15. The key step is reloading the as-synthesized material with structure-directing agent, Pluronic (R) P123, prior to selective functionalization of the external surface with a silylating agent. This new approach represents a significant improvement over literature procedures. Results from physisorption analyses as well as solid-state NMR permit a detailed, quantitative assessment of functionalized SBA-15. This work also provides insight into the stability of the silyl layer during extraction procedures - an issue often neglected in other studies but of significant importance as decomposition of this layer could result in the introduction of new silanols and reduce the effectiveness of any selective grafting procedure. (C) 2014 Elsevier Inc. All rights reserved.

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