Voltammetry at 1, 6-dichlorohexane | and 1, 4-dichiorobutane| water interfaces

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  • KATANO Hajime
    Department of Bioscience, Faculty of Biotechnology, Fukui Prefectural University

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Other Title
  • １，６‐ジクロロヘキサンおよび１，４‐ジクロロブタン｜水界面の電荷移動ボルタンメトリー
  • 2004 シカタ メダル キネン ロンブン 1 6 ジクロロヘキサン オヨビ 1 4 ジクロロブタン スイカイメン ノ デンカ イドウ ボルタンメトリー

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The usefulness of 1, 6-dichlorohexane (1, 6-DCH) and 1, 4-dichlorobutane (1, 4-DCB) as organic solvent (O) for ion-transfer voltammetry at O | water (W) interface has been examined, and the results are compared with those with 1, 2-dichioroethane (1, 2-DCE). The vapor pressure of 1, 6-DCH is very low (6 Pa at 25 °C), indicating that the solvent is useful for the O-phase particularly from the viewpoint of practical applications. The width of potential window of the 0.1 M tetraoctylammonium tetrakis(4-chlorophenyl)borate (O) | 0.05 M Li2SO4 (W) interface increased in the sequence: O = 1, 6-DCH > 1, 4-DCB > 1, 2-DCE. The voltammetric behavior of the transfer of various cations and anions at the 1, 6-DCH | and 1, 4-DCB | W interfaces has been shown to be of reversible nature, and the midpoint potentials or the reversible half-wave potentials have been determined. The midpoint potentials of hydrophilic ions have also been determined by the analysis of anodic final rise or cathodic final decent of the voltammograms with the O | W interfaces, where the W contains a salt of the hydrophilic ion. The effect of ion-pair formation in O on the midpoint potentials has been discussed. The usefulness of 1, 6-DCH for voltammetry of electron-transfer at O | W interface has also been discussed.

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