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Liquid-Liquid Extraction and Liquid Chromatographic Studies on Interactions of Inorganic Anions with Coordinatively Unsaturated Copper(II) Complexes of Heterocyclic Azo Compounds

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Abstract

The interactions between Cu(II) complexes with heterocyclic azo compounds and several anions were studied by equilibrium analysis of ion-pair extraction, RP-HPLC of metal complexes, and ion chromatography of anions on an ODS column coated with Cu(II) complexes of the long alkyl derivatives. Both ion-pair extraction and HPLC studies demonstrated that a dicationic complex with 8-(3,5-dibromo-2-pyridylazo)-5-aminoquinoline interacted with anions stronger than a monocationic complex with 2-(2-pyridylazo)methylphenol. Anions were more retained on the column coated with dicationic Cu(II) complex. Such differences were quantitatively ascribed to the first ion-pair formation of the dicationic complex giving a monocationic species.

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Authors and Affiliations

  1. Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, 466-8555, Nagoya, Showa, Japan

    Takashi Yasui, Yuki Kashihara, Fumiko Miyake, Seiko Sugitani, Hiromichi Yamada & Akio Yuchi

Authors
  1. Takashi Yasui
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  2. Yuki Kashihara
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  3. Fumiko Miyake
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  4. Seiko Sugitani
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  5. Hiromichi Yamada
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  6. Akio Yuchi
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Correspondence to Takashi Yasui.

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Yasui, T., Kashihara, Y., Miyake, F. et al. Liquid-Liquid Extraction and Liquid Chromatographic Studies on Interactions of Inorganic Anions with Coordinatively Unsaturated Copper(II) Complexes of Heterocyclic Azo Compounds. ANAL. SCI. 24, 993–997 (2008). https://doi.org/10.2116/analsci.24.993

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  • DOI: https://doi.org/10.2116/analsci.24.993

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