PMO-Immobilized AuI-NHC Complexes: Heterogeneous Catalysts for Sustainable Processes

被引：11

作者：

De Canck, Els ^{[1
]}

Nahra, Fady ^{[2
,3
]}

Bevernaege, Kevin ^{[1
,2
,3
]}

Vanden Broeck, Sofie ^{[2
,3
]}

Ouwehand, Judith ^{[1
]}

Maes, Diederick ^{[1
,2
,3
]}

Nolan, Steven P. ^{[2
,3
]}

Van der Voort, Pascal ^{[1
]}

机构：

[1] Univ Ghent, COMOC, Dept Chem, Campus Sterre,Krijgslaan 281,Bldg S3, B-9000 Ghent, Belgium

[2] Univ Ghent, Dept Chem, Campus Sterre,Krijgslaan 281,Bldg S3, B-9000 Ghent, Belgium

[3] Univ Ghent, Ctr Sustainable Chem, Campus Sterre,Krijgslaan 281,Bldg S3, B-9000 Ghent, Belgium

来源：

CHEMPHYSCHEM | 2018年 / 19卷 / 04期

关键词：

alkyne hydration; gold; heterogeneous catalysis; N-heterocyclic carbene; periodic mesoporus organosilica; PERIODIC MESOPOROUS ORGANOSILICA; HETEROCYCLIC CARBENE COMPLEXES; SILVER-FREE PROTOCOLS; GOLD CATALYSIS; ORGANIC-REACTIONS; ROOM-TEMPERATURE; SECONDARY ALCOHOLS; METAL-COMPLEXES; ALKYNES; HYDRATION;

D O I：

10.1002/cphc.201701102

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A stable periodic mesoporous organosilica (PMO) with accessible sulfonic acid functionalities is prepared via a one-pot-synthesis and is used as solid support for highly active catalysts, consisting of gold(I)-N-heterocyclic carbene (NHC) complexes. The gold complexes are successfully immobilized on the nanoporous hybrid material via a straightforward acid-base reaction with the corresponding [Au(OH)(NHC)] synthon. This catalyst design strategy results in a boomerang-type catalyst, allowing the active species to detach from the surface to perform the catalysis and then to recombine with the solid after all the starting material is consumed. This boomerang behavior is assessed in the hydration of alkynes. The tested catalysts were found to be active in the latter reaction, and after an acidic work-up, the IPr*-based gold catalyst can be recovered and then reused several times without any loss in efficiency.

引用

页码：430 / 436

页数：7

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