発色団を有するポリチアザアルカン誘導体を用いる金属イオンのセンシングと分離

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タイトル別名
  • Metal ion sensing and separation using chromogenic polythiazaalkane derivatives.
  • ハッショクダン オ ユウスル ポリチアザアルカン ユウドウタイ オ モチイル キンゾク イオン ノ センシング ト ブンリ

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Acyclic and cyclic dithiaza- and tetrathiazaalkane derivatives bearing the 6-trifluoromethyl-2, 4-dinitrophenylhydrazono moiety as a chromogenic group on the nitrogen atom of the alkanes were synthesized and studied as complexing chromogenic reagents for a particular metal ion. In order to evaluate the metal ion recognition properties of these compounds, the following behaviors were examined: proton dissociation, metal ion complexation, metal ion extraction, and metal ion transport through a liquid membrane containing the compound. First, all of the hydrazone derivatives exhibited a similar proton dissociation constants and a silver ion selective complexation behavior in a 1, 4dioxane-water solution. The blue shifts of the absorption spectra were caused by complexation of the hydrazone derivatives with silver ion. The complexing ability is mainly dependent on the number of sulfur atoms in the molecule. Secondly, tetrathiazaalkane hydrazone derivatives exhibited high selectivity for silver ion in the solvent extraction of some heavy metal ions. Drastic red shifts of the absorption spectra of the organic phase were observed in the extraction of silver ion with tetrathiazaalkane hydrazone derivatives. Acyclic tetrathiazaalkane hydrazone derivative extracted silver ion most efficiently. Thirdly, tetrathiazaalkane hydrazone derivatives exhibited effective uphill silver ion transport ability. Especially, a rapid and selective transport of silver ion was observed for an acyclic tetrathiazaalkane analog through liquid membranes.

収録刊行物

  • 分析化学

    分析化学 48 (1), 45-55, 1999

    公益社団法人 日本分析化学会

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