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Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates.
Le Natur, François; Calvez, Guillaume; Guégan, Jean-Paul; Le Pollès, Laurent; Trivelli, Xavier; Bernot, Kevin; Daiguebonne, Carole; Neaime, Chrystelle; Costuas, Karine; Grasset, Fabien; Guillou, Olivier.
  • Trivelli X; ∥Université Lille 1-Sciences et Technologies, UMR CNRS 8576 UGSF, IFR 147-FRE 3637, F-59655 Villeneuve d'Ascq, France.
Inorg Chem ; 54(12): 6043-54, 2015 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-26024151
For the first time, hexanuclear complexes with general chemical formula [Ln6O(OH)8(NO3)6(H2O)n](2+) with n = 12 for Ln = Sm-Lu and Y and n = 14 for Ln = Pr and Nd were stabilized as nanoaggregates in ethylene glycol (EG). These unprecedented nanoaggregates were structurally characterized by (89)Y and (1)H NMR spectroscopy, UV-vis absorption and luminescence spectroscopies, electrospray ionization mass spectrometry, diffusion ordered spectroscopy, transmission electron microscopy, and dynamic light scattering. These nanoaggregates present a 200 nm mean solvodynamic diameter. In these nanoaggregates, hexanuclear complexes are isolated and solvated by EG molecules. The replacement of ethylene glycol by 2-hydroxybenzyl alcohol provides new nanoaggregates that present an antenna effect toward lanthanide ions. This results in a significant enhancement of the luminescence properties of the aggregates and demonstrates the suitability of the strategy for obtaining highly tunable luminescent solutions.





Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Revista: Inorg Chem Ano de publicação: 2015 Tipo de documento: Artigo