| 纯水中检测汞离子与银离子的菲啰啉类荧光探针 |
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| 基金项目:国家自然科学基金项目(21165006)；教育部“春晖计划”项目(Z2016008) |
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| 中文摘要:合成了菲啰啉类化合物探针1，并通过核磁共振波谱( NMR)、质谱( MS)、红外光谱(IR)对其结构进行了表征。利用荧光发射光谱考察了探针1对Hg2+及Ag+的识别性能。结果表明，探针1在纯水介质中以荧光猝灭的方式识别Hg2+和Ag+，其结合比分别为1∶1和2∶1，检测的线性范围分别为9.0×10-7~1.1×10-5和8.0×10-7~7.0×10-6 mol/L，相关系数(r2)均大于0.99，检出限均低至10-8mol/L。根据探针1识别前后荧光强度的剧烈变化，建立了裸眼检测Hg2+和Ag+的可视化分析方法。通过等温量热滴定与1H NMR滴定考察了识别过程的热力学参数和作用机理。该研究对生物体及环境领域中Hg2+和Ag+的实时监测具有潜在的应用价值。 |
| 中文关键词:纯水介质 菲啰啉衍生物 荧光探针 汞离子 银离子 |
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| A Phenanthroline Based Fluorescence Probe for Identification of Hg2+and Ag+ in Pure Aqueous Medium |
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| Abstract:A phenanthroline based fluorescent probe 1 was synthesized.The structure of the probe was characterized by nuclear magnetic resonance spectroscopy(NMR),masss pectrometry(MS) and infrared spectroscopy(IR),and the recognition performance of the probe toward Hg2+ and Ag+ was investigated by fluorescence emission spectroscopy.Results indicated that Hg2+ and Ag+ in pure water medium were recognized by the probe via fluorescence quenching with the ratios of 1∶1 and 2∶1,respectively.There were linear relationships for Hg2+ and Ag+ in the concentration ranges of 9.0×10-7-1.1×10-5mol/L and 8.0×10-7-7.0×10-6mol/L,respectively,with their correlation coefficients(r2) larger than 0.99.The limits of detection were both as low as 10-8 mol/L.A visual analysis method was established for the detection of trace Hg2+ and Ag+ using the probe based on the obvious changes of fluorescence intensity.The thermodynamic parameters and recognition mechanism were evaluated using isothermal titration calorimetry(ITC) and 1H NMR titration.This method has a potential application value for the real-time monitoring of Hg2+ and Ag+ in the biological and environmental fields. |
| Key Words:aqueous medium phenanthroline derivative fluorescence probe Hg2+ Ag+ |
| 引用本文：廖贤，袁剑英，牟兰，曾晞.纯水中检测汞离子与银离子的菲啰啉类荧光探针[J].分析测试学报,2019,38(6):706-711. |
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