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Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates

Abstract : For the first time, hexanuclear complexes with general chem. 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 89Y and 1H 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 diam. In these nanoaggregates, hexanuclear complexes are isolated and solvated by EG mols. The replacement of ethylene glycol by 2-hydroxybenzyl alc. 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 solns.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01162339
Contributor : Laurent Jonchère <>
Submitted on : Wednesday, June 10, 2015 - 11:14:20 AM
Last modification on : Wednesday, September 2, 2020 - 1:22:04 PM

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Francois Le Natur, Guillaume Calvez, Jean-Paul Guégan, Laurent Le Polles, Xavier Trivelli, et al.. Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates. Inorganic Chemistry, American Chemical Society, 2015, 54 (12), pp.6043-6054. ⟨10.1021/acs.inorgchem.5b00947⟩. ⟨hal-01162339⟩

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