Structural investigation of the Tb(III)-Ln(III) (Ln=Nd, Sm) binary system in molten LiCl-KCl eutectic salt by fluorescence resonance energy transfer

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The structural change of Lncl(6)(3-) and the complexation between metal chloride ions in the Tb(III)-Ln(III) (Ln=Nd, Sm) binary molten salt were investigated for the first time based on fluorescence resonance energy transfer (FRET). Tb(III) was used as a donor because the emission of Tb(III) is significantly overlapped with the absorption of various lanthanide elements. The collisional (or dynamic) quenching due to the energy transfer between Tb(III) and Ln(III) was evidently clarified in terms of fluorescence intensity and lifetime of the Tb(III) donor ions relative to the increasing concentration of acceptor ions, which were decreased at equal fraction. The Forster energy transfer was employed to measure the Forster distance (R-0) and the center-to-center distance between lanthanide chloride ions in the molten LiCl-KCI eutectic. The Forster distance (R-0) in the Tb(III)-Ln(III) binary system was firstly obtained and the center-to-center distance between lanthanide chlorides was calculated using the Forster distance (R-0) and the energy transfer efficiency. Based on the FRET results, the structural change of Lncl(6)(3-) and the complexation between metal chloride ions of interest were not found under the experimental conditions.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2015-05
Language
English
Article Type
Article
Keywords

ELECTRONIC-ABSORPTION-SPECTRA; LANTHANIDE AQUO IONS; HYPERSENSITIVE TRANSITIONS; ELECTROCHEMICAL-BEHAVIOR; THERMODYNAMIC PROPERTIES; VIBRATIONAL-MODES; HIGH-TEMPERATURE; CHLORIDE MELTS; AL ELECTRODES; RARE-EARTHS

Citation

JOURNAL OF LUMINESCENCE, v.161, pp.239 - 246

ISSN
0022-2313
DOI
10.1016/j.jlumin.2015.01.029
URI
http://hdl.handle.net/10203/200974
Appears in Collection
NE-Journal Papers(저널논문)
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