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長谷川 裕子*; 玉城 沙也香*; 矢島 弘文*; 小林 徹; 矢板 毅
Proceedings of 19th International Solvent Extraction Conference (ISEC 2011), 7 Pages, 2011/10
Synergistic extraction behaviour of lanthanide(III) (Ln(III)) with pivaloyltrifluoroacetone (HA) and N-methyl-N-phenyl-1,10-phenanthroline-2-carboxamide (MePhPA), tetraethylmethylene diphosphonate (POPO), 1-[2-[bis(2-ethylhexyl)-carbamoyl]ethyl] pyrrolidine-2-carboxylic acid (CEPA), 2,2-bipyridyl(bpy) or 2-pyridine aldoxime (PAOX) was examined across the Ln series. The extractability of Sm(III) with HA and these Lewis bases (B) was in the following sequence: MePhPA POPO CEPA bpy PAOX. From the detailed data-analysis, it was found that the dominant extracted species of Ln(III) was the ternary complex as LnAB.
長谷川 裕子*; 玉城 沙也香*; 矢島 弘文*; 橋本 文治*; 矢板 毅
Talanta, 85(3), p.1543 - 1548, 2011/09
被引用回数:38 パーセンタイル:77.33(Chemistry, Analytical)Synergistic extraction of trivalent lanthanides (Lns(III)) with pivaloyltrifluoroacetone (HA) and N-methyl-N-phenyl-1,10-phenanthroline-2-carboxamide (MePhPTA) was evaluated across the Ln series. The distribution ratio () of Sm(III) under an identical condition was the largest among all Lns(III). The separation factor (SF) between Sm(III) and Nd(III) (SF=/) was 2.0 and SF between Sm(III) and Eu(III), (/) was 1.4. Upon analyzing the extraction data in detail on the basis of mass balance, it was found that the dominant extracted species of light Lns(III) was a stable ternary complex consisting of Ln(III), HA, and MePhPTA (B), namely, LnAB, while the dominant extracted species of heavy Lns(III) was the ion pair, [LnAB]ClO. The complex for Pr(III) was very stable. It suggests that LnA can form two 5-membered rings with MePhPTA, and the size of Pr(III) matches to the distance between the donor atoms in MePhPTA.