Temperature effect on fluorescence and UV-vis absorption spectroscopic properties of Dy(III) in molten LiCl-KCl eutectic salt

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The spectroscopic properties of Dy(III) in molten LiCl-KCl eutectic salt at high temperature were investigated by time-resolved laser fluorescence spectroscopy (TRLFS) and UV-vis absorption spectroscopy. For the first time, a visible fluorescence of Dy(III) in high-temperature LiCl-KCl eutectic salt was measured due to the electronic transitions from I-4(13/2) and F-4(9/2) to H-6(J/2) (J=7, ... , 15). The effect of temperature on hypersensitivity for the electronic transitions from the I-4(13/2) excited state (similar to 25700 cm(-1)) of Dy(III) was confirmed by altering temperature in chloride eutectic salt in accord with optical absorption measurements. The molar absorptivity of I-4(13/2) <- H-6(15/2) was enhanced with increasing temperature. The fluorescence intensity of Dy(III) followed a simple mono-exponential decay curve, suggesting the formation of a single chemical species in high-temperature LiCl-KCl molten salt. (C) 2012 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2012-11
Language
English
Article Type
Article
Keywords

HYPERSENSITIVE TRANSITIONS; ELECTROCHEMICAL-BEHAVIOR; THERMODYNAMIC PROPERTIES; CHLORIDE MELTS; AL ELECTRODES; LANTHANIDES; DYSPROSIUM; LUMINESCENCE; SPECTRA; GADOLINIUM

Citation

JOURNAL OF LUMINESCENCE, v.132, no.11, pp.3066 - 3071

ISSN
0022-2313
DOI
10.1016/j.jlumin.2012.06.023
URI
http://hdl.handle.net/10203/102225
Appears in Collection
NE-Journal Papers(저널논문)
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