Alkali Metal Ion-Selective Electrodes Based on Bis(crown ether) Derivatives Containing Nitrogen Atom

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  • KIMURA Keiichi
    Department of Applied Chemistry, Faculty of Engineering, Osaka University
  • OISHI Hideki
    Department of Applied Chemistry, Faculty of Engineering, Osaka University
  • SAKAMOTO Hidefumi
    Department of Applied Chemistry, Faculty of Engineering, Osaka University
  • SHONO Toshiyuki
    Department of Applied Chemistry, Faculty of Engineering, Osaka University

Bibliographic Information

Other Title
  • 窒素原子を含むビス(クラウンエーテル)のアルカリ金属イオン選択性電極への応用
  • チッソ ゲンシ オ フクム ビス クラウンエーテル ノ アルカリ キンゾク イ

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Abstract

Lipophilic bis(monoaza-12-crown-4) [1a], bis (monoaza-15-crown-5) [1b], bis (12-crown4) [2], and corresponding monocyclic monoazacrown ethers [3a] and [3b] were applied to neutral carriers of ion-selective electrodes for sodium and potassium ions. The potential response of these electrodes towards sodium and potassium ions were found to be dependent on pH of the solution. The ion-selective electrodes based on [1a] and [1b] showed Nernstian or near-Nernstian response in wide activity ranges of the metal ions in the solution of high pH, showing prominent selectivities for sodium and potassium ions, respectively (kPotNaK for [1a] electrode: 8.9 x1O-3, kPotKNa. for [1b] electrode: 9.1 x 10-3, at pH 13). The bis(monoaza crown ether)s are superior to the corresponding monocyclic analogs, [3a] and [3b], significantly as the neutral carriers of the sodium and potassium ion-selective electrodes. In spite of the similar bis(crown ether) structure, [2] is inferior to [1a] in the sodium selectivity. The excellent sodium selectivity of the electrode based on [1a] was not affected much by the parameter of ion-selective membrane such as variation of plasticizer, neutral carrier concentration, and addition of lipophilic salt.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1987 (3), 277-282, 1987-03-10

    The Chemical Society of Japan

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