Fluorination Effect on the Gibbs Transfer Energy for Methylene Group from 1,2-Dichloroethane or 1,1,1,2,3,4,4,5,5,5-Decafluoropentane to Water

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  • UEMATSU Kohei
    Department of Bioscience and Biotechnology, Fukui Prefectural University
  • YAMAGATA Junpei
    Department of Bioscience and Biotechnology, Fukui Prefectural University
  • SAKAE Hiroki
    Department of Bioscience and Biotechnology, Fukui Prefectural University
  • KATANO Hajime
    Department of Bioscience and Biotechnology, Fukui Prefectural University
  • OSAKAI Toshiyuki
    Department of Chemistry, Kobe University

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タイトル別名
  • Fluorination Effect on the Gibbs Transfer Energy for Methylene Group from 1,2-Dichloroethane or 1,1,1,2,3,4,4,5,5,5-​Decafluoropentane to Water

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<p>The ion-transfer reactions of alkyl and perfluoroalkyl carboxylate ions (CH3(CH2)n–2COO− and CF3(CF2)n–2COO−) at 1,2-dichloroethane (DCE) | water (W) and 1,1,1,2,3,4,4,5,5,5-decafluoropentane (DFP) | W interfaces were investigated. These ions gave reversible or quasi-reversible voltammetric waves due to their ion transfer across the interfaces, and the formal potentials and the formal Gibbs transfer energies from a non-aqueous solvent to water, ΔG°′tr,α→W (α = DCE and DFP), were determined. The ΔG°′tr,α→W for CH3(CH2)n–2COO− and CF3(CF2)n–2COO− linearly increased with n, allowing for estimating ΔG°′tr,α→W for methylene groups. The estimated value of ΔG°′tr,DCE→W for the –CH2– group was higher than that of ΔG°′tr,DCE→W for the –CH2– group, whereas the ΔG°′tr,DCE→W for the –CF2– group was lower than that of ΔG°′tr,DCE→W for the –CF2– group, indicating that the –CH2– (or –CF2–) group is more favorably (or unfavorably) solvated in the DCE phase compared to the DFP phase. From the estimated values, the fluorination effect of alkyl chains on partitioning the alkyl group between the biphase media has also been discussed.</p>

収録刊行物

  • Analytical Sciences

    Analytical Sciences 37 (12), 1707-1712, 2021-12-10

    社団法人 日本分析化学会

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