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首页> 外文期刊>Journal of Materials Science >Perfluoroalkylsulfonic acid-functionalized periodic mesostructured organosilica: a strongly acidic heterogeneous catalyst
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Perfluoroalkylsulfonic acid-functionalized periodic mesostructured organosilica: a strongly acidic heterogeneous catalyst

机译：全氟烷基磺酸功能化的周期性介孔结构有机硅：一种强酸性多相催化剂

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摘要

Periodic mesostructured organosilicas (PMO) were synthesized using 1,2-bis(trimethoxysilyl)ethane (BTME) under acidic conditions using Pluronic 123 as surfactant. The PMO ethane-silicas were then grafted with 1,2,2-trifluoro-2-hydroxy-1-trifluoromethylethane sulfonic acid β-sultone yielding a new perfluoroalkylsulfonic acid PMO catalyst. Ordered hexagonal mesostructures (P6mm) with surface areas up to 500 m2/g and narrow pore size distribution (around 5.1 nm) were obtained. This work thus provides an example of chemical modification for the conception of functionalized PMO acid catalysts. Liquid phase self-condensation of heptanal and acetalization of heptanal by 1-butanol were performed at 30 and 75 °C in the presence of these catalysts and results were compared with those obtained with several other heterogeneous hydrophobic acid catalysts.
机译：使用Pluronic 123作为表面活性剂，在酸性条件下使用1,2-双（三甲氧基甲硅烷基）乙烷（BTME）合成了周期性的介孔结构有机硅（PMO）。然后将PMO乙烷-二氧化硅与1,2,2-三氟-2-羟基-1-三氟甲基乙烷磺酸β-磺内酯接枝，生成新的全氟烷基磺酸PMO催化剂。获得了有序的六角形介孔结构（P6mm），表面积高达500 m 2 / g，孔径分布窄（约5.1 nm）。因此，这项工作为官能化的PMO酸催化剂的概念提供了化学修饰的实例。在这些催化剂的存在下，在30和75°C下进行庚烷的液相自缩合和1-丁醇对庚醛的缩醛化，并将结果与​​其他几种非均相疏水性酸催化剂得到的结果进行比较。

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