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New Route to Stabilize Ruthenium Nanoparticles with Non‐Isolable Chiral N‐Heterocyclic Carbenes
Author(s) -
MartínezPrieto Luis Miguel,
Ferry Angélique,
Lara Patricia,
Richter Christian,
Philippot Karine,
Glorius Frank,
Chaudret Bruno
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201502601
Subject(s) - ruthenium , chemistry , catalysis , selectivity , nanoparticle , medicinal chemistry , combinatorial chemistry , organic chemistry , stereochemistry , nanotechnology , materials science
Ru nanoparticles (RuNPs) stabilized by non‐isolable chiral N‐heterocyclic carbenes (NHCs), namely SIDPhNp ((4 S ,5 S )‐1,3‐di(naphthalen‐1‐yl)‐4,5‐diphenylimidazolidine) and SIPhOH (( S )‐3‐((1 S ,2 R )‐2‐hydroxy‐1,2‐diphenylethyl)‐1‐(( R )‐2‐hydroxy‐1,2‐diphenylethyl)‐4,5‐dihydro‐3 H ‐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 techniques 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.