Laser-induced fluorescence and infrared spectroscopic studies on the specific solvation of tris(1-(2-thienyl)-4,4,4-trifluoro-1,3-butanedionato)europium(III) in an ionic liquid

Highly Efficient Extraction Separation of Lanthanides Using a Diglycolamic Acid Extractant

“…The spectra were normalized using the peak intensity of the 5 D0 → 7 F1 transition. [36][37][38] The fluorescence decays of the Eu 3+ complexes in the organic phase were measured by TRLFS (Fig. S3, Supporting Information).…”

Highly Selective Synergism for the Extraction of Lanthanoid(III) Ions with β-Diketones and Trioctylphosphine Oxide in an Ionic Liquid

“…[7][8][9] Because ILs can also act as liquid ion exchangers, not only neutral but also charged complexes are extractable into the IL phase by ion exchange with the cationic or anionic constituent of the ILs. [10][11][12][13] Thus, the extractability and separability of metal ions in the IL extraction system are expected to differ from those of the usual organic solvent systems. 14,15 Recently, the present authors have reported on the synergistic ionic-liquid extraction of lanthanoids(III) (Ln(III)) with 2-thenoyltrifluoroacetone (Htta) as an acidic chelating extractant and several neutral ligands in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C4mim][Tf2N]).…”

“…13 All other chemicals used were of analytical or guaranteed reagent-grade, and were used as received. High purity deionized water (18.2 MΩ cm) was used throughout this study.…”

A Specific Synergistic Effect in Ionic Liquid Chelate Extraction Based on Neutral Ternary Chloro-complex Formation

“…(It was reported that a hydrated complex (Eu(tta)3(H2O)3, tta -= thenoyltrifluoroacetonate) is dehydrated in C4mimTf2N. 7 ) Intriguingly, the addition of larger amount of C4mimCl (1.0 × 10 -1 mol dm -3 ) to the aqueous phase instead of equivalent amount of NaCl resulted in enhancement of Zn 2+ extraction to some extent. This result suggests that not only a neutral species but also an anionic ternary chloro-complex species, such as Zn(tsq)2Cl -or Zn(tsq)Cl2 -, can be the dominant extracted species in the use of other ILs having different ion-exchange ability.…”

“…[1][2][3][4] Unlike molecular organic solvents, ILs have a much high polarity and ability as liquid ion-exchangers. Several coordinatively-unsaturated neutral complexes are extracted into ILs due to the former nature, [5][6][7] and several cationic 8,9 and anionic 5,10,11 complexes are also extracted due to the latter nature. Namely, the use of ILs as extraction solvents can result in a novel extraction separation performance.…”