酸碱双功能化六方介孔硅的直接合成及其在级联反应中的催化活性。

Direct synthesis of acid-base bifunctionalized hexagonal mesoporous silica and its catalytic activity in cascade reactions.

机构信息

College of Chemistry, Jilin University, Changchun 130023, PR China.

出版信息

J Colloid Interface Sci. 2011 Mar 1;355(1):190-7. doi: 10.1016/j.jcis.2010.10.042. Epub 2010 Oct 25.

DOI:10.1016/j.jcis.2010.10.042

Abstract

A series of efficient acid-base bifunctionalized hexagonal mesoporous silica (HMS) catalysts contained aminopropyl and propanesulfonic acid have been synthesized through a simple co-condensation by protection of amino group. The results of small-angle XRD, TEM, and N(2) adsorption-desorption measurements show that the resultant materials have mesoscopic structures. X-ray photoelectron spectroscopies, elemental analysis (EA), back titration, (29)Si NMR and (13)C NMR confirm that the organosiloxanes were condensed as a part of the silica framework. The resultant catalysts exhibit excellent acid-basic properties, which make them possess high activity for one-pot deacetalization-Knoevenagel and deacetalization-nitroaldol (Henry) reactions.

摘要

一系列高效的酸碱双功能化六方介孔硅（HMS）催化剂，含有氨丙基和丙磺酸，通过氨基的保护，通过简单的共缩聚合成。小角 XRD、TEM 和 N2 吸附-脱附测量的结果表明，所得材料具有介孔结构。X 射线光电子能谱、元素分析（EA）、反滴定、（29）Si NMR 和（13）C NMR 证实，有机硅氧烷缩合为二氧化硅骨架的一部分。所得催化剂表现出优异的酸碱性能，使其在一锅法脱乙酰基-Knoevenagel 和脱乙酰基-硝基醇醛（Henry）反应中具有高活性。