Rhodium Nanoparticles Stabilized by PEG-Tagged Imidazolium Salts as Recyclable Catalysts for the Hydrosilylation of Internal Alkynes and the Reduction of Nitroarenes

Catalysts

Guillem Fernández¹  Roser Pleixats¹ 

[1] Department of Chemistry and Centro de Innovación en Química Avanzada (CINQA), Universitat Autònoma de Barcelona, 08193-Cerdanyola del Vallès, Barcelona, Spain;

关键词: alkynes;    catalysis;    hydrosilylation;    nitroarenes;    recycling;    reduction;   

DOI  :  10.3390/catal10101195

来源: DOAJ

【 摘 要 】

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).

【 授权许可】

Unknown