Optical analysis and separation of trivalent lanthanides in deep eutectic solvents  

作　　者：Anika Soldner Burkhard Konig 

机构地区：[1]Institute of Organic Chemistry,University of Regensburg,Universitaetsstrasse 31,93053 Regensburg,Germany

出　　处：《Journal of Rare Earths》2020年第7期784-792,I0004,共10页稀土学报（英文版）

基　　金：Project supported by the ForCYCLE program of the Bavarian State Ministry of the Environment and Consumer Protection (BAF01SoFo-65211)。

摘　　要：Deep eutectic solvents(DESs) were used for luminescence measurements in quantitative analysis of trivalent lanthanide ions and as solvents for light rare earth elements(LREE) in solid-liquid separation.The spectroscopic characteristics of lanthanide chlorides LnCl3(Ln=Eu,Tb),respectively their aquo complexes,are described in a comprehensive study that demonstrates the significant enhancement of the phosphorescence emission intensity in DESs as polar and weakly coordinating solvent.Several DESs stabilize the lanthanide ion luminescence against changes in temperature and moisture,which is advantageous compared with the use of ionic liquids.Small amounts of water lead in certain eutectic systems even to a further increase in phosphorescence emission intensity.By investigating the solubility of lanthanide sesquioxides Ln2 O3(Ln=La,Nd,Sm,Eu,Gd,Tb,Dy) in DESs,selectivities are identified that may be of use for the separation of LREE.

关 键 词：Deep eutectic solvents EUROPIUM TERBIUM LUMINESCENCE SEPARATION Rare earths 

分 类 号：O614.33[理学—无机化学]