Voltammetric Study of N, N'-Dimethyl-9, 9'-biacridinium Dinitrate (Lucigenin) in Dimethyl Sulfoxide and Aqueous Solutions

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  • WADA Setsuko
    Laboratory of Chemistry, The University of Electro-Communications
  • MAEDA Koko
    Department of Chemistry, Faculty of Science, Ochanomizu University
  • NAKADA Kazuo
    Laboratory of Chemistry, The University of Electro-Communications

Bibliographic Information

Other Title
  • ジメチルスルホキシドおよび水溶液中におけるN,N'-ジメチル-9,9'-ビアクリジニウムニ硝酸塩(ルシゲニン)のボルタンメトリーによる研究
  • ジメチルスルホキシドおよび水溶液中におけるＮ，Ｎ′‐ジメチル‐９，９′‐ビアクリジニウム二硝酸塩（ルシゲニン）のボルタンメトリーによる研究

Abstract

Electrochemical behavior of N, N'-dimethyl-9, 9'-biacridinium dinitrate (DBA2.2 NO, -) was investigated by means of cyclic and rotating ring-disk electrode voltammetry and constantpotential coulometry.<BR>On the cyclic voltammogram of lucigenin dissolved in dimethyl sulfoxide (DMSO), two peaks were observed at -0.51 V vs. Ag/AgNO, on the cathodic scan and at +0.21 V on the anodic scan. Results of coulometry confirmed that the overall processes of reduction from DBA" to N, N'-dimethyl-9, 9'-biacridinylidene (DBA) and of oxidation from DBA to DBA" require transfer of two electrons. However, the result of voltammetry suggested that the reduction process proceeds via the intermediate, N, N'-dimethyl-9, 9'-biacridinium radical cation (DBA) Results with the mixed solution of lucigenin and 1, 1'-diphenyl-2-picrylhydrazyl (DPPH) sug-gested the existence of electro-chemically generated DBA. Next two types of redution steps are proposed as the most probable mechanisms. It is not clear at present which is more probable.<BR>Voltammograms of lucigenin in the aqueous solution were quite similar to those in DMSO, aside from the effect due to adsorption. When the sample was left for 24 hours in the alkaline solution of pH ca.8, another new peak at +0.92 V (vs. SCE) was observed on anodic scan.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1977 (5), 639-645, 1977-05-10

    The Chemical Society of Japan

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