Extraction of Am(III) and Eu(III) with a Dimethylaminomethylated Derivative of Calix[4]resorcinolarene

Synergism as a phenomenon in solvent extraction of 4f-elements with calixarenes

“…It is said that the cyclic tetramer calix [4]arene carboxyl derivative preferentially extracts sodium ions at rst and then the sodium-loaded ligand extracts Ln(III) as a "pre-organized" extractant. 79 Kuznetsova et al 80,81 have studied the extraction of some fions (La, Pr, Yb, Lu, Ho, Eu, Am) with calix [4]resorcinarene or its alkylaminomethylated derivatives (dimethylamino-, piperidyl-and trimethylammonium moieties), (4 Â 10 À4 M, Fig. 11) in the presence of 1,10-phenanthroline (8 Â 10 À4 M) in n-heptanol.…”

“…84 1-Heptanol appears to be a better diluent than dichloroethane on the extraction of Am(III) and Eu(III) nitrates from neutral or weakly acidic aqueous solutions (pH 4-6) with dimethylaminomethylated calix [4]resorcinolarene in combination with 1,10- phenantroline. 81 Additions of 1,10-phen to the organic phase decrease by 2-3 orders of magnitude the concentration of resorcinolarene required for efficient f-ion extraction showing synergism. The D Am value grows from 0.01 to 0.1 and the Am content in the third phase appreciably decreases going from dichloroethane to 1heptanol.…”

“…Kuznetsova et al reported that in the process approximately 50% of the f-elements appear in the third phase. 81 The effect of molecular organic diluents on the extraction of all 15 4f-ions plus Y(III) from 3 M HNO 3 medium with 0.05 M solution of CMPO-functionalized ionic liquid (1-[3[[(diphenylphosphinyl)acetyl]amino]propyl]-3-tetradecyl-1H-imidazol-3ium hexauorophosphate) has been studied by another Russian research group. 107 These experiments have shown that the extractability increased in the order: nitrobenzene < 1,2dichloroethane < chloroform < o-xylene with a decreasing solvating power of a diluent.…”

Effect of Diluents on The Synergistic Solvent Extraction and Separation of Trivalent Lanthanoids With 4-Benzoyl-3-Phenyl-5-Isoxazolone and tert-Butylcalix[4]Arene Tetrakis(N,N-Dimethyl Acetamide) and Structural Study of Gd(III) Solid Complex By IR and NMR

“…In recent decades, the development of macrocyclic chemistry has contributed widely to the separation science. − Many calixarene derivatives with different functional groups such as ketono, ester, and amide have been prepared and studied as cyclic extractants. − The solvent extraction of trivalent lanthanoid and actinoid ions with various calixarenes has been investigated by Arnaud-Neu et al, − Kuznetsova et al, − Bünzli et al, , Ludwig et al, , etc. It was noted that the cavity size, the position and kind of donor groups, and the ligand’s hydrophobicity have a pronounced impact on the extraction power and selectivity.…”

Extraction and Separation of Rare Earths from Nitrate Medium by Mixtures of p‐Phosphorylated Calixarene and 1‐Phenyl‐3‐methyl‐4‐benzoyl‐pyrazalone‐5

“…For instance, it seems more practical to be used in the separation of rare earths [25] and recovery of radioactive elements in the nuclear industry. [27][28][29] In our previous work, we studied the extraction and separation of lanthanides and actinide by some calixarene derivatives and found that they exhibit good selectivity towards thorium over lanthanides under proper conditions. [27][28][29] In our previous work, we studied the extraction and separation of lanthanides and actinide by some calixarene derivatives and found that they exhibit good selectivity towards thorium over lanthanides under proper conditions.…”