Potential scale for ion transfers at the water|1,6-dichlorohexane interface |
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Authors: | Mickaë l Rimboud |
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Affiliation: | UMR CNRS no. 6521, Faculté des Sciences et Techniques, Université de Bretagne Occidentale, 6 avenue Le Gorgeu, C.S. 93837, 29238 Brest cedex 3, France |
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Abstract: | 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). |
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Keywords: | 1,6-Dichlorohexane (DCH) Liquid|liquid microinterface Voltammetry Ion partition Conditional potential scale |
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