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Issue 122, 2015
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Influence of Na+ ion doping on the phase change and upconversion emissions of the GdF3: Yb3+, Tm3+ nanocrystals obtained from the designed molecular precursors

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Abstract

Bottom-up synthesis of a series of GdF3 nanocrystals (NCs) co-doped with 20 mol% Yb3+, 2 mol% Tm3+ and varying amount of Na+ ions is reported using novel molecular precursors [Ln2(TFA)6(diglyme)2] [Ln = Gd (1), Tm (2), Yb (3)] and [Na4(TFA)4(diglyme)] (4) [TFA = CF3COO; diglyme = MeO(CH2CH2O)2Me]. The single crystal X-ray structures of the new complexes 1–4, which act as excellent precursors because of the absence of water molecules and the ability of the diglyme ligand to behave as a capping reagent during decomposition to render the nanoparticles monodisperse in organic solvents, show a versatile bonding mode of the TFA (dangling η1 or bridging μ,η11; μ41111- and μ41112 (O, F)) and diglyme (η3 or μ-η31) ligands. The influence of Na+ ion doping on the phase change and upconversion emissions of these GdF3: Yb3+, Tm3+ NCs was studied and compared with the upconversion (UC) intensity of the well-known upconverting NaGdF4: Yb3+, Tm3+ NCs. Among the several UC samples studied, the GdF3: Yb3+, Tm3+ NCs with 30 mol% Na+ seemed to be the most promising as a red emitting UC phosphor, emitting more photons than the NaGdF4: Yb3+, Tm3+ UC NCs in the near IR region.

Graphical abstract: Influence of Na+ ion doping on the phase change and upconversion emissions of the GdF3: Yb3+, Tm3+ nanocrystals obtained from the designed molecular precursors

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Publication details

The article was received on 07 Oct 2015, accepted on 16 Nov 2015 and first published on 17 Nov 2015


Article type: Paper
DOI: 10.1039/C5RA20781A
Citation: RSC Adv., 2015,5, 100535-100545
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    Influence of Na+ ion doping on the phase change and upconversion emissions of the GdF3: Yb3+, Tm3+ nanocrystals obtained from the designed molecular precursors

    H. Ayadi, W. Fang, S. Mishra, E. Jeanneau, G. Ledoux, J. Zhang and S. Daniele, RSC Adv., 2015, 5, 100535
    DOI: 10.1039/C5RA20781A

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