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

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  • SAKATO Motoya
    Department of Chemistry, Faculty of Science, Toho University
  • HIRAYAMA Naoki
    Department of Chemistry, Faculty of Science, Toho University Research Center for Materials with Integrated Properties, Toho University

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説明

In the chelate extraction of zinc(II) into an ionic liquid (IL), 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (C4mimTf2N), with 8-(p-toluenesulfonamido)quinoline (Htsq), the co-existence of a certain amount of chloride anion in the aqueous phase resulted in an enhancement of the extractability. This enhancement did not occur at all in that into chloroform, a conventional organic extraction solvent. The specific synergistic effect was based on the dominant extraction of a neutral ternary complex, Zn(tsq)Cl, which is unstable in molecular organic solvents.

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  • Analytical Sciences

    Analytical Sciences 30 (8), 783-785, 2014

    社団法人 日本分析化学会

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