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Feng M, Pointillart F, Le Guennic B, et al. Unprecedented sensitization of visible and near-infrared lanthanide luminescence by using a tetrathiafulvalene-based chromophore. Chem Asian J. 2014;9(10):2814-25doi: 10.1002/asia.201402385.
Feng, M., Pointillart, F., Le Guennic, B., Lefeuvre, B., Golhen, S., Cador, O., Maury, O., & Ouahab, L. (2014). Unprecedented sensitization of visible and near-infrared lanthanide luminescence by using a tetrathiafulvalene-based chromophore. Chemistry, an Asian journal, 9(10), 2814-25. https://doi.org/10.1002/asia.201402385
Feng, Min, et al. "Unprecedented sensitization of visible and near-infrared lanthanide luminescence by using a tetrathiafulvalene-based chromophore." Chemistry, an Asian journal vol. 9,10 (2014): 2814-25. doi: https://doi.org/10.1002/asia.201402385
Feng M, Pointillart F, Le Guennic B, Lefeuvre B, Golhen S, Cador O, Maury O, Ouahab L. Unprecedented sensitization of visible and near-infrared lanthanide luminescence by using a tetrathiafulvalene-based chromophore. Chem Asian J. 2014 Oct;9(10):2814-25. doi: 10.1002/asia.201402385. Epub 2014 Aug 01. PMID: 25087945.
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Chem Asian J. 2014 Oct;9(10):2814-25. doi: 10.1002/asia.201402385. Epub 2014 Aug 01.

Unprecedented sensitization of visible and near-infrared lanthanide luminescence by using a tetrathiafulvalene-based chromophore.

Chemistry, an Asian journal

Min Feng, Fabrice Pointillart, Boris Le Guennic, Bertrand Lefeuvre, Stéphane Golhen, Olivier Cador, Olivier Maury, Lahcène Ouahab

Affiliations

  1. Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, 263 Avenue du Général Leclerc 35042 Rennes Cedex (France).

PMID: 25087945 DOI: 10.1002/asia.201402385

Abstract

Ligand L was synthesized and then coordinated to [Ln(hfac)3]⋅2 H2O (Ln(III)=Tb, Dy, Er; hfac(-)=1,1,1,5,5,5-hexafluoroacetylacetonate anion) and [Ln(tta)3]⋅2 H2O (Ln(III)=Eu, Gd, Tb, Dy, Er, Yb; tta(-)=2-thenoyltrifluoroacetonate) to give two families of dinuclear complexes [Ln2(hfac)6(L)]⋅C6H14 and [Ln2(tta)6(L)]⋅2 CH2Cl2. Irradiation of the ligand at 37,040 cm(-1) and 29,410 cm(-1) leads to tetrathiafulvalene-centered and 2,6-di(pyrazol-1-yl)-4-pyridine-centered fluorescence, respectively. The ligand acts as an organic chromophore for the sensitization of the infrared Er(III) (6535 cm(-1)) and Yb(III) (10,200 cm(-1)) luminescence. The energies of the singlet and triplet states of L are high enough to guarantee an efficient sensitization of the visible Eu(III) luminescence (17,300-14,100 cm(-1)). The Eu(III) luminescence decay can be nicely fitted by a monoexponential function that allows a lifetime estimation of (0.49±0.01) ms. Finally, the magnetic and luminescence properties of [Yb2(hfac)6(L)]⋅C6H14 were correlated, which allowed the determination of the crystal field splitting of the (2)F(7/2) multiplet state with M(J)=±1/2 as ground states.

© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: chromophores; lanthanides; luminescence; magnetic properties; sulfur-containing heterocycles

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