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Séminaire Chimie ED459

Gold and silver nanomaterials from organometallic precursors : synthesis and properties

Dr. Miguel Monge Oroz (Departamento de Quimica – Grupo de Investigacion, Sintesis de Compuestos de Metales del Grupo 11, Universidad de La Rioja, Espagne)

publié le , mis à jour le

Le Jeudi 12 Février 2009 à 13h45
UM2, salle de cours SC-16.01

The increased interest in the synthesis of new metal-based nanomaterials stems from the fact that new electronic, optical or magnetic properties can be reached at this length scale. By the use of our experience in gold and silver organometallic and coordination chemistry we have developed new methods for the synthesis of silver and gold precursors and nanoparticles (NPs).

Silver nanoparticles have been synthesized through the decomposition under very mild conditions of the organometallic precursor [Ag(C6F5)] in the presence of different types of stabilizing agents. This method leads to Ag NPs of small size (< 10 nm) which are ideal for their use as antibacterial agents.[1]

Gold metallodendrimers have been synthesized by the coordination of Au(I) fragments to the periphery of PPh2-modified PAMAM or PPI dendrimers. Some of the synthesized metallodendrimers present interesting photophysical properties or can be used as precursors for dendrimer stabilized Au nanoparticles or dendrimer encapsulated Au NPs depending on the experimental conditions.[2,3]

Scheme 1 (cliquer pour l’agrandir)

Scheme 1. Ag NPs stabilized by long alkyl chain amines (left) ; dendrimer stabilized Au NPs (centre) and dendrimer encapsulated gold nanoparticles (right).

References

1. E. J. Fernández, J. García-Barrasa, A. Laguna, J. M. López-de-Luzuriaga, M. Monge, C. Torres, Nanotechnology 2008, 19, 185602 (6 pp).
2. E. J. Fernández, A. Laguna, J. M. López-de-Luzuriaga, M. Monge, M. Montiel, M. E. Olmos, R. C. Puelles, E. Sánchez-Forcada, Eur. J. Inorg. Chem. 2007, 4001.
3. E. J. Fernández, A. Laguna, M. Monge, M. Montiel, M. E. Olmos, J. Pérez, E. Sánchez-Forcada, Dalton Trans. 2009, 474.

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