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

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  • OKAMURA Hiroyuki
    Faculty of Chemistry, Institute of Science and Engineering, Kanazawa University Division of Chemistry for Nuclear Engineering, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency
  • TAKAGI Hitomi
    Faculty of Chemistry, Institute of Science and Engineering, Kanazawa University
  • ISOMURA Taku
    Faculty of Chemistry, Institute of Science and Engineering, Kanazawa University
  • MORITA Kotaro
    Faculty of Chemistry, Institute of Science and Engineering, Kanazawa University
  • NAGATANI Hirohisa
    Faculty of Chemistry, Institute of Science and Engineering, Kanazawa University
  • IMURA Hisanori
    Faculty of Chemistry, Institute of Science and Engineering, Kanazawa University

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抄録

Selective synergism for the extraction of lanthanoids(III) (Ln) with β-diketones such as 2-thenoyltrifluoroacetone, 2-naphthoyltrifluoroacetone, and benzoylacetone has been investigated in the presence of trioctylphosphine oxide as a hydrophobic neutral ligand in 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide as an ionic liquid. The extractability of heavier Ln was remarkably enhanced, resulting in a significant improvement in the separation of Ln. It was found that the present synergism is ascribed to the formation of cationic ternary complexes, followed by ion exchange into the ionic liquid.

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  • Analytical Sciences

    Analytical Sciences 30 (3), 323-325, 2014

    社団法人 日本分析化学会

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