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Vanadium Oxo Organometallic Species Supported on Silica for the Selective Non-oxidative Dehydrogenation of Propane

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posted on 2013-11-11, 00:00 authored by Kai C. Szeto, Björn Loges, Nicolas Merle, Nicolas Popoff, Alessandra Quadrelli, Hongpeng Jia, Elise Berrier, Aimery De Mallmann, Laurent Delevoye, Régis M. Gauvin, Mostafa Taoufik
The molecular complex [V­(O)­(Mes)3] (1) reacts with silica partially dehydroxylated at 700 °C (SiO2‑700) to afford [(SiO)­V­(O)­(Mes)2] (2) as the major surface species, while a bis-grafted surface species [(SiO)2V­(O)­(Mes)] (3) is obtained on SiO2‑200. These surface species were characterized by DRIFT, Raman, 1H, 13C, and 51V solid-state NMR, and XAFS spectroscopy and show an activity in the non-oxidative dehydrogenation of propane at 500 °C. The bipodal surface organometallic complex displays a higher selectivity in propylene in comparison to the monopodal species.

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