过渡金属纳米粒子的结构和表面性质的离子液体.pdfVIP

View Article Online / Journal Homepage / Table of Contents for this issue CRITICAL REVIEW /csr | Chemical Society Reviews On the structural and surface properties of transition-metal nanoparticles in ionic liquids Jairton Dupont* and Jackson D. Scholten Received 4th November 2009 2. First published as an Advance Article on the web 8th February 2010 3 : 3 DOI: 10.1039/b822551f 4 : 3 1 5 1 Ionic liquids (ILs), in particular imidazolium-based ILs, have proven to be suitable media for the 0 2 / generation and stabilisation of soluble metal nanoparticles (NPs). Indeed, transition-metal NPs 1 1 / 9 with small sizes, narrow size distribution and different shapes have been prepared by reduction 1 n of organometallic compounds with molecular hydrogen, decomposition of transition-metal o y t i complexes in the zero-valent state, metal bombardment or simple transfer for previously prepared s r e water- or classical organic solvent-soluble colloids to the ILs. The formation and stabilisation of v i n U NPs in these highly hydrogen bonded organised supramolecular fluids occur with the l a re-organisation of the hydrogen bond network and the generation of nanostructures with polar m r o and non-polar regions, including the NPs. The IL forms a protective layer, which is probably N g composed of imidazolium aggregates located immediately adjacent to the nanoparticle surface, n a i j which provides both steric and electronic protection against aggregation and/or agglomeration. e h Z Thes