Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 122, Issue 1-3, Pages 240-246Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2009.03.006
Keywords
Periodic mesoporous organosilica; Ionic liquid; Immobilization; SBA-15; Friedel-Crafts reaction
Categories
Funding
- National Natural Science Foundation of China [20803021]
- Hunan Provincial Natural Science Foundation of China [07JJ3027]
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Preparation of novel periodic mesoporous organosilica (PMO) materials of SBA-15 incorporating Lewis acidic chloroindate(III) ionic liquid moieties was achieved via a multistep process, in which N-(3-triethoxysilylpropyl), N(3)-(3-trimethoxysilylpropyl-4,5-dihydroimidazolium chloride was firstly synthesized and used as bridging organosilica precursor to co-condense with tetraethoxysilane (TEOS) in the presence of PI 23, followed by removal of the template, then the addition of InCl3 gave rise to the PMO materials with Lewis acidity. The obtained PMO materials were well characterized. The XRD, TEM, and N-2 adsorption-desorption results indicated that the PMO materials retained the structural integrity during the template extraction and successive InCl3-loading process. FT-IR and solid-state Si-29 and C-13 CP/MAS-NMR analyses showed the organic structure of the bridging organosilica precursor could be incorporated into the PMO materials invariantly. Compared with SBA-15 Supported InCl3, the PMO materials revealed high efficiency and better reusability in the Friedel-Crafts reaction between benzene and benzyl chloride. More importantly, such immobilized chloroindate(III) ionic liquids had low Moisture sensitivity, showing the great potential for practical applications. (C) 2009 Elsevier Inc. All rights reserved.
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