Nanoparticles organometallic

Keywords Anion ATP Dendrimer Halide Nanoparticle Organometallic Redox Sensor... 

Keywords Organometallic Nanoparticles Surface chemistry Self-organization Catalysis... 

The most intensive development of the nanoparticle area concerns the synthesis of metal particles for applications in physics or in micro/nano-electronics generally. Besides the use of physical techniques such as atom evaporation, synthetic techniques based on salt reduction or compound precipitation (oxides, sulfides, selenides, etc.) have been developed, and associated, in general, to a kinetic control of the reaction using high temperatures, slow addition of reactants, or use of micelles as nanoreactors [15-20]. Organometallic compounds have also previously been used as material precursors in high temperature decomposition processes, for example in chemical vapor deposition [21]. Metal carbonyls have been widely used as precursors of metals either in the gas phase (OMCVD for the deposition of films or nanoparticles) or in solution for the synthesis after thermal treatment [22], UV irradiation or sonolysis [23,24] of fine powders or metal nanoparticles. 

All these experiments show that the use of various NMR techniques can indeed contribute to the precise characterization of organometallic nanoparticles . 

In summary, we have described our approach towards the synthesis of novel nano-objects consisting of a metal core and a surface that may be functionalized by addition of organic ligands. TEM pictures of the metal core of these nanoparticles appear similar to those of particles commonly used in heterogeneous catalysis or to colloids prepared by well-known reduction methods. However, the organometallic approach displays several specificities which can be summarized as follows ... 

Finally, the groups of Chaudret and Choukroun have demonstrated that PVP-protected native Rh nanoparticles synthesized by an organometallic approach are active in the hydrogenation of benzene in a biphasic mixture. 

Chandret B (2005) Synthesis and Snrface Reactivity of Organometallic Nanoparticles. 16 233-259... 

ROsch N (1999) A Critical Assessment of Density Functional Theory with Regard to Applications in Organometallic Chemistry. 4 109-163 Roucoux A (2005) Stabilized Noble Metal Nanoparticles An Unavoidable Family of Catalysts for Arene Derivative Hydrogenation. 16 261-279... 

The synthesis of metal nanoparticles via the controlled decomposition of pre-prepared organometallic complexes or metal carbonyls where the metals are already in the zero valent or low-valent state has been known since 1970. The first examples were Pd- and Pt-dibenzylideneacetone complexes where the coordinated ligands detached using either hydrogen of carbon monoxide under mild conditions to give the respective metal nanoparticles [310]. 

Esumi, K., Sarashina, S. and Yoshimura, T. (2004) Synthesis of gold nanoparticles from an organometallic compound in supercritical carbon dioxide. Langmuir,... 

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