A Brønsted acid functionalized periodic mesoporous organosilica and its application in catalytic condensation and THP protection/deprotection reactions
A Brønsted acid functionalized periodic mesoporous organosilica and its application in catalytic condensation and THP protection/deprotection reactions
复制标题
布朗斯台德酸功能化周期性介孔有机硅及其在催化缩合和THP保护/脱保护反应中的应用
DOI:
10.1016/j.micromeso.2017.05.047
复制
发表时间:
2017
影响因子:
5.2
通讯作者:
W. R. Thiel
中科院分区:
文献类型:
--
作者:
B. Schäfgen;O. D. Malter;E. Kaigarula;A. Schüßler;S. Ernst;W. R. Thiel
In this work we report the synthesis of a periodic mesoporous organosilica (PMO) derived from 1,4-bis(triethoxysilyl)benzene (BTEB) and its functionalization with propane sulphonic acid groups via the post synthetic grafting method according to modified procedures from the literature. The material contains an acid loading of approx. 0.50 mmol/g. Being applied in various catalytic reactions, it shows moderate to little activity in condensation reactions. In THP-protection of alcohols the material is highly efficient and superior to known silica supported sulphonic acid catalysts. The activity in the corresponding deprotection reaction is comparable to typical catalysts used in this field. In addition, the acidic PMO is recyclable without any loss of activity over three catalytic runs. The mesoporous material was thoroughly characterized by solid-state CP-MAS NMR to follow the functionalization process, powder XRD to show the 2D hexagonal structure that remains pristine through all modifications and BET measurements that show a high surface area between 1185 m2/g and 681 m2/g and a stable pore diameter of around 50 Å.
登录
查看更多内容
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Zhou Zhou;Q. Meng;A. Seifert;Alex Wagener;Yu Sun;S. Ernst;W. Thiel
通讯作者:
W. Thiel
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
J. Lauwaert;Judith Ouwehand;J. Clercq;P. Cool;P. Voort;J. Thybaut
通讯作者:
J. Thybaut
影响因子:
1.8
作者:
Shimizu, K;Hayashi, E;Kitayama, Y
通讯作者:
Kitayama, Y
DOI:
--
发表时间:
1950
期刊:
影响因子:
--
作者:
W. Davey
通讯作者:
W. Davey
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
S. Shylesh;Mingjun Jia;Andreas Seifert;Sridhar Adappa;Stefan Ernst;W. Thiel
通讯作者:
W. Thiel