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Synthesis, characterization and catalytic activity of acid–base bifunctional materials by controlling steric hindrance
- Source :
-
Microporous & Mesoporous Materials . Mar2010, Vol. 128 Issue 1-3, p120-125. 6p. - Publication Year :
- 2010
-
Abstract
- Abstract: Two acid–base bifunctional mesoporous materials Benzyl-APS-S-SBA-15 and Anthracyl-APS-S-SBA-15 (APS: (3-trimethoxysilanyl-propyl)-amine) were successfully synthesized by a direct synthesis method. The influence of steric hindrance upon prevention of interaction between acid and base was investigated by using two different secondary amines, benzyl-(3-trimethoxysilanyl-propyl)-amine and anthracyl methyl-(3-trimethoxysilanyl-propyl)-amine. X-ray diffraction (XRD), N2 adsorption, thermogravimetric analysis (TGA), scanning electron micrographs (SEM), transmission electron micrographs (TEM), elemental analysis, back titration, and 29Si magic-anglespinning (MAS) NMR were employed to characterize the synthesized mesoporous bifunctional materials. The experimental results indicate that the guests can be well dispersed in the channel of SBA-15, and the obtained materials exhibit excellent acid–basic properties, which make it possess high activity for the aldol condensation of acetone with 4-nitrobenzaldehyde. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 13871811
- Volume :
- 128
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- Microporous & Mesoporous Materials
- Publication Type :
- Academic Journal
- Accession number :
- 45220288
- Full Text :
- https://doi.org/10.1016/j.micromeso.2009.08.013