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KMID : 1059519920360060824
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Journal of the Korean Chemical Society
1992 Volume.36 No. 6 p.824 ~ p.831
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Temperature and Ligand Effects on the Ho(Ⅲ) Absorption Spectra in Aqueous Solution
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Kim Mi-Kyeong
Han Wha-Jin
Jeon Seung-Joon
Kim Keon
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Abstract
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Absorption spectra were observed for several Ho(Ⅲ)-ligand systems in aqueous solution under the changes of ligand concentration and temperature. The intensity change of hypersensitive band (5I8 → 5G6) was quite remarkable with temperature and concentration, and was interpreted as the change of coordination environments. The transition intensities observed in these spectra were analyzed in terms of the Judd-Ofelt intensity parameters, Ωλ (λ = 2, 4, 6), for 4f → 4f electric dipole transitions. The Ω2 parameter was the most sensitive to the temperature and concentration. Using the changes of Ω2, Cl- and NO3- ions were found to form inner sphere complexes in aqueous solution.
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