应用化学 ›› 2010, Vol. 27 ›› Issue (06): 732-736.DOI: 10.3724/SP.J.1095.2010.90588

• 研究论文 • 上一篇    下一篇

基于喹啉衍生物的汞离子选择性荧光传感分子的合成与应用

陶文波,胡乃梁*,王辉   

  1. (安徽大学化学化工学院 合肥 230039)
  • 收稿日期:2009-09-02 修回日期:2009-11-29 出版日期:2010-06-10 发布日期:2010-06-10
  • 通讯作者: 胡乃梁,男,教授; E-mail:hnailiang@126.com; 研究方向:光谱分析化学
  • 基金资助:
    国家自然科学基金(20871039)资助项目

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 Published:2010-06-10 Online:2010-06-10
  • Contact: Nai LiangHu

摘要:

合成一种新型开-关(ON-OFF)型汞离子荧光传感分子triquinolin-8-yl benzene-1,3,5-tri-carboxylate(TQBTC)。 采用FT-IR、元素分析、1H NMR测试技术对其结构进行了表征。 在对其荧光性质的研究中发现,TQBTC的乙腈-水溶液在253.0 nm波长辐射激发下于616.0 nm处发射强荧光,且对汞离子络合有较好的选择性。 TQBTC与Hg(Ⅱ)可形成1∶3型络合物,同时使荧光线性猝灭,TQBTC可作为Hg(Ⅱ)的荧光传感分子。 建立了一种测定Hg(Ⅱ)的灵敏分析方法。 Hg(Ⅱ)浓度在0~30 μmol/L的范围内与TQBTC的荧光猝灭呈线性关系,方法检出限为0.838 μmol/L。 方法应用于实际样品中Hg(Ⅱ)的检测,获得满意结果。

关键词: 喹啉, 汞离子, 荧光猝灭, 荧光传感分子

Abstract:

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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