The attachment of organic compound onto the surface of metal oxide nanoparticles is usually the key factor in the design of new materials in the fields such as catalysis, optical devices or in the electronic area. ¹ In this presentation, we will first present syntheses of new well-defined molecular (homo- and hetero-metallic) precursors characterized by elemental analysis, NMR, Fourier transform infrared spectroscopy (FT-IR) and UV-visible spectroscopies. Their uses to crystalline surface-modified titania nanoparticles will then be described in an original one step, simple, efficient, low temperature (100°C) and aqueous sol gel synthetic methodology. ^2,3 This relevant process offers economical advantages and even convenience of being environmental friendly compared to other chemical or physical methods because: (i) none organic solvent is used and (ii) the initial aqueous solution was used dozens of time. Additional benefits of this process are high and precise control of the organic loadings and a very good chemical stability. Elemental analysis, FT-IR, XDR, TEM, nitrogen adsorption-desorption isotherm (BET), UV-Visible spectroscopy, XPS and neutron scattering data will be addressed in order to fully characterize the nano-objects as well as the chemical interaction of the organic molecule onto the TiO₂ nano-particles. Preliminary results in peptidic coupling reactions, for oxidation catalysis³ and as efficient protection additive against UV-A and -B radiations⁴ will also be demonstrated.

1. See review: C. Sanchez, B. Julian, P. Belleville and M. Popall, J. Mater. Chem., 2005, 15, 3559.
2. G. Goutailler, C. Guillard, S. Daniele, L.G. Hubert-Pfalzgraf, J. Mater.Chem., 2003, 13, 342-346.
3. M. Beyrhouty, S. Daniele, A.B. Sorokin, L.G. Hubert-Pfalzgraf, New J. Chem., 2005, 29, 1245-1248.
4. S. Daniele, L.G. Hubert-Pfalzgraf, V. Guyot-Férreol, J.F. Tranchant, Patent FR 0508382.

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1. Design of new hybrid titanias as efficient supports for gold catalysts
2. Photocatalytic Characteristics of Zinc Oxide Particles Precipitated from Concentrated Solutions at Low Temperatures
3. Versatility of Laser Pyrolysis for the Synthesis of TiO₂ Nanoparticles