Test Strips for Lead(II) Based on a Unique Color Change of PVC-film Containing O-Donor Macrocycles and an Anionic Dye

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Glassy test strips partially coated with PVC-film including <i>O</i>-donor macrocyclic receptors (L), tetrabromophenolphthalein ethyl ester (TBPE<sup>-</sup>), and a plasticizer sensed Pb<sup>2+</sup> in aqueous solutions by a unique color change. Yellow films successively changed color to green, dark-blue and purple with increases of the Pb<sup>2+</sup> concentration. In contrast with the ordinary "optode", a characteristic absorption band at 525 nm was newly appeared independently of the protonation and deprotonation of HTBPE (yellow to blue). The unique color change occurred only when asymmetric receptors with respect to the basal plane were coupled with Pb<sup>2+</sup>. This optical-structural correlation is likely to be induced by the <i>H</i> aggregate of two sets of TBPE<sup>-</sup> in the 1:2 ion-pair, [Pb-L]<sup>2+</sup>·(TBPE<sup>-</sup>)<sub>2</sub>. The color change, based on metachromasy, was exclusive for Pb<sup>2+</sup> among common metal cations (Ca<sup>2+</sup>, Al<sup>3+</sup>, Cd<sup>2+</sup>, Zn<sup>2+</sup>, Fe<sup>3+</sup>, Co<sup>2+</sup>, Hg<sup>2+</sup>) and anions (Cl<sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, PO<sub>4</sub><sup>3-</sup>, S<sub>2</sub>O<sub>3</sub><sup>2-</sup>).

収録刊行物

  • Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

    Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 23(2), 147-150, 2007-02-10

    The Japan Society for Analytical Chemistry

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各種コード

  • NII論文ID(NAID)
    10018497380
  • NII書誌ID(NCID)
    AA10500785
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09106340
  • NDL 記事登録ID
    8628775
  • NDL 雑誌分類
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL 請求記号
    Z54-F482
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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