Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates

Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates

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 89Y an...

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Veröffentlicht in:Inorganic chemistry 2015-06, Vol.54 (12), p.6043-6054
Hauptverfasser: 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
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container_end_page 6054
container_issue 12
container_start_page 6043
container_title Inorganic chemistry
container_volume 54
creator 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
description 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 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 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.
doi_str_mv 10.1021/acs.inorgchem.5b00947
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title Characterization and Luminescence Properties of Lanthanide-Based Polynuclear Complexes Nanoaggregates
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