Transition-metal nanoparticles in imidazolium ionic liquids: recyclable catalysts for biphasic hydrogenation reactions.
1-n-Butyl-3-methylimidazolium hexafluorophosphate room-temperature ionic liquid is not only suitable as a medium for the preparation and stabilization of iridium nanoparticles but also ideal for the generation of recyclable biphasic catalytic systems for hydrogenation reactions. Thus, Ir(0) nanoparticles with a mean diameter of 2 nm have been prepared by reduction of Ir(I) dissolved in the ionic liquid with H2. This catalytic solution can be reused several times for the biphasic hydrogenation of olefins under mild reaction conditions.
Dupont
Jairton
J
Laboratory of Molecular Catalysis, Institute of Chemistry, Department of Metallurgy and Institute of Physics, UFRGS, Av. Bento Gonçalves, 9500 Porto Alegre 91501-970 RS Brazil. dupont@iq.ufrgs.br
Fonseca
Gledison S
GS
Umpierre
Alexandre P
AP
Fichtner
Paulo F P
PF
Teixeira
Sergio R
SR