Electrochemical and spectroscopic investigations of Tb(III) in molten LiCl–KCl eutectic at high temperature

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

“…As discussed in our previous work [32], Tb(III) shows the fluorescence emission by the electronic transition from 5 D 4 and 5 D 3 to 7 F J (J¼ 0,…,6) in molten LiCl-KCl salt. The cross relaxation occurred at 500 1C [34] and affected the fluorescence intensity of the 5 D 4 transition significantly.…”

“…The sample temperature was controlled within 75 1C. The apparatus of experimental system has been described in more detail in our previous work [32].…”

“…However, it has not been actively applied for molten salt chemistry at high temperature. Recently, a few fluorescence spectroscopic measurements on single lanthanide element in molten chloride salts have been reported [32][33][34][35][36]. Nonetheless, there have not yet been adequate experimental evidences to prove chemical structure of a mixture of lanthanides in high temperature molten salts.…”

Temperature dependence of laser-induced fluorescence of Tb3+ in molten LiCl–KCl eutectic

“…In the present work, TRLFS of Tb 3þ in a high temperature LiClKCl eutectic was performed to extend the previous work [16], where the cross-relaxation energy transfer from 5 D 3 ! 5 D 4 was not prominent at a temperature of 540°C.…”

“…The measurements of fluorescence spectra of several lanthanides in a LiCl-KCl mixture were performed at room temperature in our laboratory [14,15]. More recently, the fluorescence spectroscopic evidence using TRLFS has been reported for a direct in situ quantification of Tb 3þ in a high temperature LiClKCl eutectic [16].…”