Design and Application of a Hybrid Material Featuring Well-Defined, Tuneable Grafting Sites for Supported Catalysis.
Article first published online: 7 MAR 2013
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 5, Issue 7, pages 1971–1977, July 2013
How to Cite
Popoff, N., Espinas, J., Pelletier, J., Szeto, K. C., Thivolle-Cazat, J., Delevoye, L., Gauvin, R. M. and Taoufik, M. (2013), Design and Application of a Hybrid Material Featuring Well-Defined, Tuneable Grafting Sites for Supported Catalysis. ChemCatChem, 5: 1971–1977. doi: 10.1002/cctc.201200850
- Issue published online: 25 JUN 2013
- Article first published online: 7 MAR 2013
- Manuscript Received: 22 NOV 2012
- French Ministry of Research and Higher Education
- TGE RMN THC Fr3050
- “MATCALCAT” ANR Project. Grant Number: ANR 07-CP2D-21-02
- supported catalysts;
A new material based on amorphous silica, and featuring a well-defined phenolic functionality was prepared in two simple steps by using commercially available, cheap reagents. Silica was first reacted with aluminum isobutyl etherate to yield an aluminum isobutyl site [(≡SiO)2Al(iBu)(Et2O)], which then selectively reacted with a hydroquinone spacer to yield [(≡SiO)2(AlOC6X4OH)(Et2O)] (X=H or F). This support material was then used to tether the organometallic tungstenocarbyne complex [W(≡CtBu)(CH2tBu)3] to yield the surface species [(≡SiO)2(AlOC6X4O-W(≡CtBu)(CH2tBu)2(Et2O)] (X=H or F). Both H- and F-containing species were fully characterized, and their activities in the self-metathesis reaction of propene to ethylene and 2-butenes were found to be two and three times higher, respectively, than the activity of the corresponding tungstenocarbyne complex directly grafted onto silica.