Abstract
The transfer of Ag+ ion across a polarized 1,6-dichlorohexane | water interface assisted by an alkene or olefin ligand, 1,5-cyclooctadiene (COD), was studied by cyclic voltammetry. Even if COD was absent from the organic phase, Ag+ ion gave a reversible voltammetric wave, and the formal potential of the non-assisted ion-transfer at the 1,6-dichlorohexane | water interface was determined from the reversible half-wave potential. By the addition of COD to the organic phase, the reversible half-wave potential shifted to more negative potentials with increasing concentration of COD. The concentration dependence of the half-wave potential revealed that the transfer of Ag+ ion is assisted by the formation of 1:1 and 1:2 Ag+-COD π-complexes in 1,6-dichlorohexane with overall formation constants of (2.1 ± 0.2) × 103 M-1 and (7.8 ± 1.0) × 103 M-2, respectively. The formal potential and the formation constants coincide well with those obtained by the potentiometry of Ag+ ion in aqueous and organic media with a Ag electrode.
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Katano, H., Tatsumi, H. & Hibi, T. Electrochemical Study of the Assisted Transfer of Silver Ion by 1,5-Cyclooctadiene at the 1,6-Dichlorohexane | Water Interface. ANAL. SCI. 21, 901–905 (2005). https://doi.org/10.2116/analsci.21.901
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DOI: https://doi.org/10.2116/analsci.21.901