期刊
POLYHEDRON
卷 179, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2020.114375
关键词
Halloysite; Polymer; Metal free catalyst; Knoevenagel condensation; Xanthenes
资金
- Iran Polymer and Petrochemical Institute, Alzahra University
- Iran National Science Foundation (INSF)
A novel metal-free solid acid catalyst, PHSA, has been designed and synthesized through facile and environmentally benign procedure via using halloysite nanoclay as a natural and biocompatible support. The synthetic protocol included co-polymerization of 2-acrylamido-2-methylpropane sulfonic acid and acrylic acid in the presence of vinyl functionalized halloysite. The metal-free solid catalyst that contained both carboxylic acid and sulfonic acid functionality exhibited high catalytic activity for catalyzing both Knoevenagel condensation and Xanthenes synthesis under mild reaction conditions in aqueous media. The presence of halloysite in the structure of PHSA rendered the catalyst heterogeneous and facilitated its recovery and recyclability compared to the halloysite-free homogeneous counterpart. High catalytic activity and recyclability of the catalyst, simplicity of the preparation procedure, using available and natural clay as a support are the merits of this new metal-free solid acid catalyst. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据