A5050691148- Lanthanide and Transition Metal Complexes
- Corrosion Behavior and Inhibition
- Organometallic Complex Synthesis and Catalysis
- Electrochemical Analysis and Applications
- Metal complexes synthesis and properties
- Analytical Chemistry and Sensors
- Synthesis and characterization of novel inorganic/organometallic compounds
- Supercapacitor Materials and Fabrication
- Semiconductor materials and devices
- Silicone and Siloxane Chemistry
- Cyclopropane Reaction Mechanisms
- Mesoporous Materials and Catalysis
- Magnetism in coordination complexes
- Molecular Junctions and Nanostructures
- Polyoxometalates: Synthesis and Applications
- Force Microscopy Techniques and Applications
- Radioactive element chemistry and processing
- Metal-Catalyzed Oxygenation Mechanisms
- Organophosphorus compounds synthesis
- Conducting polymers and applications
- Electrophoretic Deposition in Materials Science
- Layered Double Hydroxides Synthesis and Applications
- Luminescence Properties of Advanced Materials
- Advanced Chemical Sensor Technologies
- Advanced ceramic materials synthesis
Centre Interuniversitaire de Recherche et d’Ingénierie des Matériaux
2011-2024
Université Toulouse III - Paul Sabatier
2012-2024
Université de Toulouse
2010-2024
Centre National de la Recherche Scientifique
2011-2024
Institut National Polytechnique de Toulouse
2010-2023
Laboratoire Matériaux et Durabilité des Constructions
2021-2022
Laboratoire de Chimie
1991-2020
Centre d’Élaboration de Matériaux et d’Études Structurales
2008
Université de Montréal
1996-2008
California Institute of Technology
1996
Environmentally compliant organic–inorganic hybrid coatings for efficient corrosion protection of metallic surfaces are potential alternatives to the current method based on chromate passivation.
A new betadiketonate ligand displaying a trimethoxysilyl group as grafting function and diketone moiety complexing site (TTA-Si = 4,4,4-trifluoro-2-(3-trimethoxysilyl)propyl)-1-3-butanedione (C4H3S)COCH[(CH2)3Si(OCH3)3]COCF3) its highly luminescent europium(III) complex [Eu(TTA-Si)3] have been synthesized fully characterized. Luminescent silica-based hybrids prepared well with this grafted on the surface of dense silica nanoparticles (28 ± 3 nm) or mesoporous particles. The covalent bonding...
A range of talc-like phyllosilicates were prepared via a hydrothermal synthesis performed at five different temperatures from 160 to 350 °C. The organization the lattice and degree crystallinity new materials evaluated by techniques such as XRD, FTIR, solid-state 29Si NMR, TEM, FEG-SEM TG-DTA. When synthesized low temperature material presents high hydration, flawed structure. This was attributed stevensite-talc interstratified product present in samples. stevensite/talc ratio hydration...
In this work we have synthesized and characterized new hybrid nanoplatforms for luminescent biolabeling based on the concept of Eu 3+ complexes encapsulation in mesoporous silica nanoparticles ( ≈ 100 nm). been selected basis their capability to be excited at 365 nm which is a currently available wavelength, routine epifluorescence microscope. For encapsulation, two different routes used: first route consists grafting transition metal complex into wall surface. The second way deals with...
New nanohybrids were synthesized by grafting organosilanes on silica nanoparticles. These containing dibipyridine, urea, and urethan functionalities can be used as new synthons for nanotechnology, catalysis, or nanocomposites. The influence of the organosilane amount was studied together with pH solvent effects. have been thoroughly characterized diffuse reflectance IR Fourier transform (DRIFT) NMR spectroscopies, electron microscopy (transmission scanning), thermogravimetry...
A new highly luminescent europium complex with the formula [Eu(TTA)3(Bpy-Si)], where TTA stands for thenoyltrifluoroacetone, (C4H3S)COCH2COCF3, chelating ligand and Bpy-Si, Bpy-CH2NH(CH2)3Si(OEt)3, is an organosilyldipyridine displaying a triethoxysilyl group as grafting function has been synthesized fully characterized. This bifunctional grafted onto surface of dense silica nanoparticles (NPs) on mesoporous microparticles well. The covalent bonding [Eu(TTA)3(Bpy-Si)] inside uniform Stöber...
This work focuses on the grafting of transition metal complexes silica surface nanoparticles. Nanoscale particles in aqueous sols are used as starting silicated materials. We have undertaken synthesis europium(III) containing organosilyldipyridine ligands, (EtO)3Si(CH2)3NHCH2-bipy (1) and (EtO)(CH3)2Si(CH2) 3NHCH 2-bipy (2), view a direct reaction Reaction one molar equivalent 1 2 with Eu(tmhd)3 (tmhd= 2,2,6,6-tetramethyl-3,5-heptanedionato), precursor, leads to octacoordinated silylated...
Reaction of RhCl(PR3)n (R = Me (n 4), Et 3)) and RhCl(CO)(PEt3)2 with (trimethylsilyl)diazomethyl lithium at −78 °C in ether yields the three complexes Rh[C(N2)SiMe3](PEt3)3 (1), Rh[C(N2)SiMe3](PMe3)4 (2), Rh[C(N2)SiMe3](CO)(PEt3)2 (3). 2 could not be isolated as a solid room temperature but 1 was precipitated red crystals that were stable enough to handled under argon. X-ray work on reveals tetrahedrally distorted square-planar geometry planar ligand roughly perpendicular P3RhC coordination...
Luminescent silica nanoparticles are frequently employed for biotechnology applications mainly because of their easy functionalization, photo-stability, and biocompatibility. Bifunctional (BSNPs) described here as new efficient tools investigating complex biological systems such biofilms. Photoluminescence is brought about by the incorporation a silylated ruthenium(II) complex. The surface properties particles were designed reaction with amino-organosilanes, quaternary...
Silicon oxynitride (SiOxNy) thin films are widely encountered in today's major key enabling technologies. Exhibiting tunable properties dependent on the nitrogen content, they attract attention applications requiring thermal stability, high dielectric constant, corrosion resistance, surface passivation, and effective ion diffusion barrier. Identification of minimum desired level incorporation for each application is important simultaneously optimizing material deposition process. In this...
Corrosion is a major problem for durability of many metals and alloys. Among the efficient classical surface treatments, chromate-based treatments must be banished from industrial use due to their toxicity. At same time, sol-gel routes have demonstrated high potential develop an barrier effect against aggressive environments. By this process, anti-corrosion property can also associated others in case development multi-functional hybrid coatings. In paper, main goal precisely improve both...
For many industrial applications, the simultaneous presence in a material of different functional properties is necessary. The main interest lies making single more versatile and durable, less fragile efficient. In this study, two concomitant same were mainly studied: resistance to cracking increase its hydrophobic properties. chosen process was sol-gel route due versatility ease formulating materials from various precursors order obtain (multi)functional materials. paper, coatings prepared...
A series of Ru(II) complexes with monosilylated-dipyridine ligand have been synthesized and fully characterized were then covalently attached to silica nanoparticles. Two types hybrids obtained depending on the experimental procedure. In first approach, metal incorporated inside nanoparticles leaving a free hydroxylated surface for further functionalization. These based nanohybrids are similar well known encapsulating [Ru(bpy)3]2+ preventing release dye when used in aqueous or organic...
Lanthanide (Ln) complexes emitting in the near-infrared (NIR) region have fostered great interest as upcoming optical tags owing to their high spatial and temporal resolution emission well deeper light penetration biological tissues for non-invasive monitoring. For use live-cell imaging, lanthanide with long-wavelength absorption good brightness are especially critical. Light-harvesting ligands of Ln typically excited ultraviolet region, which turn trigger simultaneously autofluorescence...