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Non-aqueous Capillary Electrophoresis of p-Quinone Anion Radicals

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Abstract

The electrophoretic detection of two kinds of p-quinone anion radicals arising from the electrolysis of benzoquinone and chloranil was achieved by employing an acetonitrile medium. Sufficient dehydration of a running solution was necessary for the detection of the benzoquinone anion radical. Oxygen in the running solution also caused a serious decrease in the amount of the benzoquinone anion radical during electrophoresis. The addition of methanol as a hydrogen-donor decreased the electrophoretic mobility of the benzoquinone anion radical significantly, while that of the chloranil anion radical was little changed. This result is interpreted in terms of hydrogen-bonding interaction between the p-quinone anion radicals and methanol, reflecting the magnitude of their proton-accepting ability (benzoquinone anion radical > chloranil anion radical).

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Authors and Affiliations

  1. Gifu Pharmaceutical University, Mitahora-higashi, Gifu, 502-8585, Japan

    Yukihiro Esaka, Noriko Okumura, Bunji Uno & Masashi Goto

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  1. Yukihiro Esaka
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  2. Noriko Okumura
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  3. Bunji Uno
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  4. Masashi Goto
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Esaka, Y., Okumura, N., Uno, B. et al. Non-aqueous Capillary Electrophoresis of p-Quinone Anion Radicals. ANAL. SCI. 17, 99–102 (2001). https://doi.org/10.2116/analsci.17.99

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  • DOI: https://doi.org/10.2116/analsci.17.99

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