Sulfonic acid functionalized periodic mesostructured organosilica as heterogeneous catalyst

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• 作者：David Dubé ; Micha Rat ; Franç ; ois Bé ; l ; Serge Kaliaguine
• 关键词：Periodic mesostructured organosilicas ; Solid acid catalysts ; Sulfonic acid functionalized PMO ; Heterogeneous catalysis ; Heptanal condensation
• 刊名：Microporous and Mesoporous Materials
• 出版年：2008
• 期刊代码：78_13871811
• 类别：ch
• 出版时间：15 April 2008
• 卷：111
• 期：1-3
• 页码：596-603
• 文件大小：849 K

摘要

Periodic mesostructured organosilicas (PMO) were first synthesized using 1,2-bis(triethoxysilyl)ethylene (BTENE) under acidic conditions using Pluronic 123 as surfactant. The ethylene bridges were then arylated with benzene using AlCl₃ as catalyst. These materials were further treated with sulfuric acid for the sulfonation of the phenyl moieties yielding a new preparation of sulfonic acid functionalized PMO. Ordered hexagonal mesostructures with surface areas up to 440 m²/g and narrow pore size distribution (around 5.3 nm) were obtained. This work thus provides a new example of chemical modification for the conception of functionalized PMO catalysts. Liquid phase self-condensation of heptanal was performed at 75 °C in the presence of these catalysts and the results were compared with those obtained with several other heterogeneous acid catalysts.