PMO-immobilized Au(I)-NHC complexes: Heterogeneous catalysts for sustainable processes

Pascal van der Voort, Els De Canck, Fady Nahra, Kevin Bevernaege, Sofie Vanden Broeck, Judith Ouwehand, Diederick Maes, Steven P. Nolan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

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
Original languageEnglish (US)
Pages (from-to)430-436
Number of pages7
JournalChemPhysChem
Volume19
Issue number4
DOIs
StatePublished - Jan 5 2018
Externally publishedYes

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