Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 48, Pages 17495-17502Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201502601
Keywords
hydrogenation; nanoparticies; N-heteracyclic carbenes; non-isolable; ruthenium
Categories
Funding
- CNRS
- UPS-Toulouse
- INSA
- DFG [SFB 858]
- EU (ERC) [NANOSONWINGS 2009-246763]
- Westfalische Wilhelms-Universitat Munster
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Ru nanoparticles (RuNPs) stabilized by non-isolable chiral N-heterocyclic carbenes (NHCs), namely SIDPhNp ((45,55)-1,3-di(naphthalen-1-yl)-4,5-diphenylimidazolidine) and SIPhOH ((S)-34(1.5,2R)-2-hydroxy-1,2-diphenylethyl)-1((R)-2-hydroxy-1,2-diphenylethyl)-4,5-dihydro-3H-imidazoline), have been synthesized through a new procedure that does not require isolation of the free carbenes. The obtained RuNPs have been characterized by state-of-the-art tech- niques and their surface chemistry has been investigated by FTIR and solid-state MAS NMR upon the coordination of CO, which indicated the presence of free and reactive Ru sites. Their catalytic activity has been tested in various hydrogenation reactions involving competition between different sites, whereby interesting differences in selectivity were observed, but no enantioselectivity.
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