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  

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

作　　者：陶文波[1] 胡乃梁[1] 王辉[1] 

机构地区：[1]安徽大学化学化工学院,合肥230039

出　　处：《应用化学》2010年第6期732-736,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20871039)资助项目

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、1HNMR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253.0nm波长辐射激发下于616.0nm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0～30μmol/L的范围内与TQBTC的荧光猝灭呈线性关系,方法检出限为0.838μmol/L。方法应用于实际样品中Hg(Ⅱ)的检测,获得满意结果。A 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.

关 键 词：喹啉 汞离子 荧光猝灭 荧光传感分子 

分 类 号：O657.3[理学—分析化学]