Electrochemistry of Cu(II)-peptide complexes containing histidine residues II. Anomalous current fluctuation in the reduction process of Cu(II)-GGH

Ko Takehara, Yasushi Ide

研究成果: ジャーナルへの寄稿記事

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The electrochemical behavior of a Cu(II)GGH solution with a mercury electrode has been investigated. Cu(II)GGH showed anomalous current-potential and current-time characteristics in the electrode processes at the mercury electrode, which are described as follows. (i) Periodical current fluctuations and subsequent sudden cessation of the fluctuation were observed in the potential step measurement. (ii) Periodical current fluctuations were observed in the drop-life of a dropping mercury electrode in the potential region where the polarographic maximum appeared. (iii) Cyclic voltammogram showed irregular current fluctuations and a reversed current peak in the cathodic and the anodic runs, respectively. (iv) The half-wave potential of Cu(II)GGH was fairly negative in comparison with that of other Cu(II)-oligopeptide complexes. All of these phenomena were proposed to relate to the adsorption and desorption behaviors of the reduction product of Cu(II)GGH. The differential equation was presented to simulate the periodicity observed in the potential step measurement and it is found that a relatively simplified equation well simulated the periodical phenomena.

元の言語英語
ページ(範囲)73-78
ページ数6
ジャーナルInorganica Chimica Acta
186
発行部数1
DOI
出版物ステータス出版済み - 8 1 1991

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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