Potential scale for ion transfers at the water1,6-dichlorohexane interface

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• 作者：Mickaë ; l Rimboud ; Catherine Elleouet ; Franç ; ois Quentel ; Maurice L’ ; Her
• 关键词：1 ; 6-Dichlorohexane (DCH) ; Liquid|liquid microinterface ; Voltammetry ; Ion partition ; Conditional potential scale
• 刊名：Electrochimica Acta
• 出版年：2010
• 出版时间：28 February 2010
• 年：2010
• 卷：55
• 期：7
• 页码：2513-2517
• 全文大小：480 K

文摘

1,6-dichlorohexane (DCH) is a solvent with a low permittivity ( = 8.8) in which ion-pairing affects electrolytic solutions. This can be noticed from voltammetric experiments at a microinterface between water (W) and DCH. Because most ion-association constants are unknown, the experimental measurements cannot be adequately corrected to calculate standard values for partition parameters, so that only conditional partition potentials can be measured. A formal ion partition potential scale is presented (electrolytes: 10⁻² M Li₂SO₄ in W; 10⁻² M THATPBCl in DCH) for a few tetraalkylammonium cations and some anions (hexafluorophosphate, perchlorate, picrate).