Abstract
PEGylated imidazolium (bromide and tetrafluoroborate) and tris-imidazolium (bromide) salts containing triazole linkers have been used as stabilizers for the preparation of water-soluble rhodium(0) nanoparticles by reduction of rhodium trichloride with sodium borohydride in water at room temperature. The nanomaterials have been characterized (Transmission Electron Microscopy, Electron Diffraction, X-ray Photoelectron Spectroscopy, Inductively Coupled Plasma-Optical Emission Spectroscopy). They proved to be efficient and recyclable catalysts for the stereoselective hydrosilylation of internal alkynes, in the presence or absence of solvent, and in the reduction of nitroarenes to anilines with ammonia-borane as hydrogen donor in aqueous medium (1:4 tetrahydrofuran/water).
Highlights
Transition metal nanoparticles (M NPs) as catalysts have received an increasing attention from the chemical community during the last two decades [1,2,3,4,5,6,7,8,9,10]
The solution was stirred overnight at room temperature, it was filtered through a Millipore filter, and the filtrate was extracted with dichloromethane
Rhodium nanoparticles M1A, M1B and M2 have been prepared by reduction of
Summary
Transition metal nanoparticles (M NPs) as catalysts have received an increasing attention from the chemical community during the last two decades [1,2,3,4,5,6,7,8,9,10]. This interest is mainly due to the physical and chemical properties derived from their small size, quantum size effects and high-surface-to volume ratio. A suitable choice of the stabilizer allows us the obtention of nanoparticles soluble in organic, fluorous or aqueous media and facilitates the recycling
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