Chinese Journal of Applied Chemistry ›› 2010, Vol. 27 ›› Issue (06): 732-736.DOI: 10.3724/SP.J.1095.2010.90588

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Synthesis and Application of a Selective Fluorescent Chemosensor for Hg(II) Based on Quinoline Derivatives

TAO Wen-Bo, HU Nai-Liang*, WANG Hui   

  1. (College of Chemistry and Chemical Engineering,Anhui University,Hefei 230039)
  • Received:2009-09-02 Revised:2009-11-29 Online:2010-06-10 Published:2010-06-10
  • Contact: Nai LiangHu


AA new ON-OFF fluorescent chemosensor (triquinolin-8-yl benzene-1,3,5-tricarboxylate,TQBTC) has been synthesized and characterized by FT-IR, elemental analysis and 1H NMR. Fluorescence studies indicate that the acetonitrileH2O solution of TQBTC shows an emission band centered at 616.0 nm when excited at 253.0 nm. TQBTC could selectively complex with mercury at a coordination ratio of 1∶3 result in a linear quenching of the emission. Consequently, TQBTC can be used as a fluorescent chemosensor for selective sensing of Hg(Ⅱ) and a sensitive method of detection of Hg(Ⅱ) has thus been established. The emission of TQBTC is quenched linearly when Hg(Ⅱ) is added quantitatively in the range of 0~30 μmol/L. The detection limit is 0.838 μmol/L. Application of this method to the detection of Hg(Ⅱ) in water samples shows satisfactory results.

Key words: quinoline, mercury ion, fluorescence quenching, fluorescent chemosensor

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