Sulfonic acid functionalized mesoporous silicas and organosilicas: synthesis, characterization and catalytic applications

TitleSulfonic acid functionalized mesoporous silicas and organosilicas: synthesis, characterization and catalytic applications
Publication TypeJournal Article
Year of Publication2007
AuthorsShylesh, S, Samuel, PP, Srilakshmi, C, Parischa, R, Singh, AP
JournalJournal of Molecular Catalysis A-Chemical
Volume274
Issue1-2
Pagination153-158
Date PublishedSEP
Type of ArticleArticle
ISSN1381-1169
Keywordscondensation, ethane-silica, heterogeneity, sulfonic acids
Abstract

Ethane bridged mesoporous organosilicas and MCM-41 having sulfonic acid groups in the pore channels were prepared by co-condensation method as well as grafting method, using 3-mercaptopropyltriethoxysilane (3-MPTS) as the sulfur precursor. TEM and N-2 sorption isotherm analysis revealed that the mesoporous structural ordering is retained after the functionalization and modifications of organic groups while FT-IR, Raman, XPS and solid-state C-13 CP MAS NMR shows the presence of sulfonic acid groups and the stability of the mesoporous framework. The catalytic activity of the developed materials was evaluated in the liquid phase Claisen-Schmidt condensation reaction of acetophenone with benzaldehyde, to probe the effect of mesoporous support surfaces as well as the role of preparation methods. Results showed that sulfonic acid functionalized ethane-silica samples were more active, selective and stable than the conventional sulfonic acid containing mesoporous catalysts. (c) 2007 Elsevier B.V. All rights reserved.

DOI10.1016/j.molcata.2007.04.040
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

3.958

Divison category: 
Center for Material Characterization (CMC)
Physical and Materials Chemistry