Anodic behaviour of the (222) macrobicyclic ligand on mercury electrode in propylenecarbonate |
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Authors: | F Peter M Gross L Pospíšil J Kůta |
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Institution: | Laboratoire d''Electrochimie et Chimie Physique du Corps Solide, Université Louis Pasteur, 61010 Strasbourg Cedex (France);J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, 11840 Prague (Czechoslovakia) |
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Abstract: | The anodic behaviour of the free macrobicyclic ligand (222) was examined by various electrochemical techniques on mercury and on platinum electrodes. From results on platinum electrode using cyclic voltammetry it appears that the anodic oxidation of (222) proceeds irreversibly at potentials more positive than +0.7 V (aq. SCE), however, its mechanism could not be determined because the anodic signal was not well developed. Under polarographic conditions a reversible anodic diffusion controlled wave at E1/2=+0.08 V (aq. SCE) was observed, corresponding to a complex formation of the ligand (222) with the ions of mercury formed by anodic polarization of mercury electrode. In excess of mercuric cations a cathodic wave at slightly more positive potentals was found. |
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