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用于检测Al3+和pH值的双功能荧光分子探针
引用本文:李静,韩书华. 用于检测Al3+和pH值的双功能荧光分子探针[J]. 分析化学, 2017, 45(9). DOI: 10.11895/j.issn.0253-3820.170125
作者姓名:李静  韩书华
作者单位:山东大学化学与化工学院,济南,250100
摘    要:
利用荧光素(Fluorescein)对罗丹明6G(Rhodamine 6G)进行修饰,得到荧光分子探针R6G-Flu杂化物.此探针可特异性识别Al3+,检出限可低至10-8 mol/L级;向含有探针分子的溶液中加入Al3+后,溶液的颜色由无色变为粉色,并且在紫外灯下发出绿色荧光,可实现肉眼对10 μmol/L Al3+的定性检测.考察了不同pH值下R6G-Flu的荧光性质. 结果表明,此探针还可用于酸性范围(pH 3.00~6.00)和碱性范围(pH 8.00~10.50)内pH值的精确检测.实验结果表明,R6G-Flu是一种可用于Al3+和pH值检测的双功能荧光分子探针.

关 键 词:双功能  荧光分子探针  pH值检测  Al3+  罗丹明衍生物

Bifunctional Fluorescence Molecular Probes for Detection of Aluminum and pH
LI Jing,HAN Shu-Hua. Bifunctional Fluorescence Molecular Probes for Detection of Aluminum and pH[J]. Chinese Journal of Analytical Chemistry, 2017, 45(9). DOI: 10.11895/j.issn.0253-3820.170125
Authors:LI Jing  HAN Shu-Hua
Abstract:
A fluorescent molecular probe R6G-Flu was prepared by modifying fluorescein onto Rhodamine 6G.The probe could be used to recognize Al3+ specifically, and the detection limit could reach as low as 10-8 mol/L.After addition of Al3+ (10 μmol/L) to the probe, the solution showed a color change from colorless to pink, and green fluorescence was observed under the UV irradiation, which could be perceived by the naked eye.By measuring the fluorescence emission intensity of R6G-Flu at different pH, the probe could also be used to determine pH in acidic pH range (3.00-6.00) and basic pH range (8.00-10.50).The detection results of Al3+ and pH indicated that the R6G-Flu was a dual-functional fluorescent molecular probe.
Keywords:Bifunctional  Fluorescence molecular probe  pH detection  Aluminum  Rhodamine derivatives
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