title: Ionic liquid mediated synthesis and surface modification of multifunctional mesoporous Eu:GdF3 nanoparticles for biomedical applications.
abstract: A procedure for the synthesis of multifunctional europium(III)-doped gadolinium(III) fluoride (Eu:GdF3) nanoparticles (~85 nm) with quasispherical shape by precipitation at 120 °C from diethylene glycol solutions containing lanthanide chlorides and an ionic liquid (1-Butyl, 2-methylimidazolium tetrafluoroborate) as fluoride source has been developed. These nanoparticles were polycrystalline and crystallized into a hexagonal structure, which is unusual for GdF3. They were also mesoporous (pore size = 3.5 Å), having a rather high BET surface area (75 m(2) g(-1)). The luminescent and magnetic (relaxivity) properties of the Eu:GdF3 nanoparticles have been also evaluated in order to assess their potentiality as "in vitro" optical biolabels and contrast agent for magnetic resonance imaging. Finally, a procedure for their functionalization with aspartic-dextran polymers is also reported. The functionalized Eu:GdF3 nanoparticles presented negligible toxicity for Vero cells, which make them suitable for biotecnological applications.
authors: Instituto de Ciencia de Materiales de Sevilla (CSIC-US), Isla de La Cartuja, 41092 Sevilla, Spain.
authors: Sonia
authors: S
authors: Rodriguez-Liviano
authors: Nuria O
authors: NO
authors: Nuñez
authors: Sara
authors: S
authors: Rivera-Fernández
authors: Jesus M
authors: JM
authors: de la Fuente
authors: Manuel
authors: M
authors: Ocaña
mesh_terms: D005063:Europium / Q000737:chemistry*; D005682:Gadolinium / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D052578:Ionic Liquids; D005063:Europium; D005682:Gadolinium