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Supported Ionic Liquid Phase Containing Palladium Nanoparticles on Functionalized Multiwalled Carbon Nanotubes: Catalytic Materials for Sequential Heck Coupling/Hydrogenation Process
Author(s) -
RodríguezPérez Laura,
Pradel Christian,
Serp Philippe,
Gómez Montserrat,
Teuma Emmanuelle
Publication year - 2011
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201000321
Subject(s) - ionic liquid , catalysis , heck reaction , palladium , nanoparticle , carbon nanotube , materials science , pyridine , ionic bonding , chemical engineering , inorganic chemistry , chemistry , organic chemistry , nanotechnology , ion , engineering
Well‐dispersed palladium nanoparticles have been prepared in ionic liquids in the presence of 4‐(3‐phenylpropyl)pyridine under dihydrogen. These nanoparticles are immobilized onto multiwalled carbon nanotubes modified with imidazolium moieties ( f CNTs). The resulting catalytic materials are tested in hydrogenation and Heck coupling reactions. Analogous Pd nanoparticles dispersed in ionic liquids have also been immobilized on silica for comparative purposes. f CNTs are found to be the best support for both hydrogenation and Heck coupling, being recycled up to four times without significant activity loss. Palladium nanoparticles supported on f CNTs are used as a single catalytic precursor for the CC coupling/ hydrogenation sequential process using [EMI][HP(O) 2 OMe] (EMI=1‐ethyl‐3‐methyl imidazolium) ionic liquid phase without addition of supplementary base.