Nonradiative energy transfer between rare-earth ions in concentrated aqueous solutions of halides
- Vavilov State Optical Institute, St. Petersburg (Russian Federation)
The probability k{sub 1} of energy transfer from the Tb{sup 3+} ion to the Er{sup 3+} ion is studied depending on the choice of the electrolyte. It is shown that k{sub t} increases by an order of magnitude at low concentrations of the rare-earth ions in LiCl and CaCl{sub 2} solutions, while this effect is absent in CsCl, NaCl, AlCl{sub 3}, LiBr, and NaBr. The effect is explained by the distortion of the distribution of the rare-earth ions, including a complete separation of phases in a solution. The regularities of the energy transfer allow one to conclude that stability of the LnCl{sub 3} salts increases with increasing the electrolyte concentration and decreases with decreasing temperature. It is shown that studies of the energy transfer between ions allow one to obtain new information on the structure of concentrated aqueous solutions of electrolytes. 13 refs., 4 figs.
- OSTI ID:
- 146113
- Journal Information:
- Optics and Spectroscopy, Vol. 78, Issue 5; Other Information: PBD: May 1995; TN: Translated from Optika i Spektroskopiya; 78: No. 5, 777-782(1995)
- Country of Publication:
- United States
- Language:
- English
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