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The memory effect in solution

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Abstract

Cyclic voltammetric measurements of N,N-dimethyl-p-toluidine (1) and other organic π-systems in acetonitrile reveal that under special experimental conditions the first voltammetric cycle differs markedly in shape and peak position from subsequent ones. This phenomenon is only observed when the electrode is polarized at negative potentials of −1.5 V for a waiting time of several minutes, scan rates of at least 5 V/s and an excess of a base. A similar phenomenon is known from conducting polymers, where the so-called memory effect is ascribed to a conformational relaxation. A detailed explanation for the corresponding phenomenon of small molecules which remain in solution cannot be given yet, but a conformational relaxation requiring longer chains can be ruled out.

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Authors and Affiliations

  1. Institut für Physikalische Chemie I, Universität Freiburg, Albertstraße 21, 79104, Freiburg, Germany

    Jürgen Heinze & Armin Rasche

Authors
  1. Jürgen Heinze
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  2. Armin Rasche
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Correspondence to Jürgen Heinze.

Additional information

Dedicated to Professor M.A. Vorotyntsev on the occasion of his 60th birthday.

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Heinze, J., Rasche, A. The memory effect in solution. J Solid State Electrochem 10, 148–156 (2006). https://doi.org/10.1007/s10008-005-0056-0

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  • DOI: https://doi.org/10.1007/s10008-005-0056-0

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