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

Fanpeng Shang; Jianrui Sun; Shujie Wu; Heng Liu; Jingqi Guan; Qiubin Kan

doi:10.1016/j.jcis.2010.10.042

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

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

Authors

Fanpeng Shang¹, Jianrui Sun, Shujie Wu, Heng Liu, Jingqi Guan, Qiubin Kan

Affiliation

¹ College of Chemistry, Jilin University, Changchun 130023, PR China.

PMID: 21185032
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.