Effects of temperature and anion type on the two-dimensional condensation of the 4,4′-bipyridine cation radical on mercury |
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Authors: | Manual Snchez-Maestre Rafael Rodríguez-Amaro Eulogia Muoz Juan Jos Ruiz Luis Camacho |
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Institution: | Manual Sánchez-Maestre, Rafael Rodríguez-Amaro, Eulogia Muñoz, Juan José Ruiz,Luis Camacho |
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Abstract: | The reduction of 4,4′-bipyridine (BPH2+2) on mercury in an acid medium gives a very narrow sharp tail-less reversible voltammetric peak that can be ascribed to the formation of a two-dimensional (2D) phase of the cation radical BPH·+2 at the electrode according to the reaction The corresponding oxidation peak possesses similar properties and arises from the destruction (fusion) of the 2D phase.In this work we studied the influence of some experimental variables, namely the type of anion present in the medium, the concentration of 4,4′-bipyridine and temperature on the 2D phase transition peaks. Also, we tested various analytical criteria to validate this assignation and fitted both voltammetric peaks numerically to the theoretical model developed for this purpose. |
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Keywords: | Electroreduction Temperature effects Anion effects Two-dimensional condensation 4 4′ -bipyridine mercury |
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