Synergic Extraction of Lanthanoids by Mixtures of LIX 54 (High Molecular Weight β-Diketone) and Bidentate Neutral Amines

Solvent extraction of lanthanum(III), europium(III) and lutetium(III) by bis(4-acyl-5-hydroxypyrazoles) derivatives

“…13). This would agree with the extraction of Eu 2 (L-4-L) 2 (L-4-LH) 2 with an extraction constant such as log K Eu 24 (HL-4-LH) = −6.0 ± 0.7. In the same pH range, the curve A 36 versus pH shows an experimental slope of 9.11 compared with a theoretical value of 9 (Fig.…”

“…Moreover, since currently thousand operations of extraction are necessary to isolate each element of the lanthanides series from the natural mixture, the improvement of the intra-group separation of lanthanides is also a relevant objective [2][3][4][5][6][7][8]. It is within this scope that some extractants, able to extract totally or separately the trivalent elements 4f, have been tested.…”

“…Miyazaki et al [13] studied the effect of the polymethylene chain length (n = 0-8, 10,20) on the extraction of copper(II) by HL-n-LH. They found that the extracted species vary with "n": Cu(L-n-L) for n = 8, 10, 20 and Cu(L-n-LH) 2 or Cu 2 (L-n-L) 2 for n = 1-7. Due to steric requirements of the Cu 2+ cation that forms square-planar coordination complexes, the bis(acyl-hydroxypyrazoles) with short polymethylene chains (n ≤ 7) are not able to fold onto it to give tetracoordinated 1:1 complexes like Cu(L-8-L) [14].…”

Structural and Luminescence Properties of Silica-Based Hybrids Containing New Silylated-Diketonato Europium(III) Complex

“…It is a current practice to obtain the relative quantum yield (ϕ 0 ) by using well-known species as references. In this work ϕ 0 was obtained for the acetonitrileÀEu 3+ complex solution by using the complex [Ru(bipy) 3 ]Cl 2 as a reference (ϕ = 2.8% in water, λ exc = 400 nm) 32 (eq 3)…”

Synergistic Solvent Extraction of Lanthanides(III) with Mixtures of 4-Benzoyl-3-Methyl-1-Phenyl-5-Pyrazolone and Phosphoryl-Containing Podands

“…and neutral donor extractants (e.g. nitrogen-containing compounds, [4][5][6] sulfoxides, 7,8 crown ethers, 3,[9][10][11] diglycolamides, 12 neutral mono-and polydentate organophosphorus compounds, [13][14][15][16][17][18][19][20] etc.) has been studied.…”