A Phenanthroline Based Fluorescence Probe for Identification of Hg2+and Ag+ in Pure Aqueous Medium

廖贤; 袁剑英; 牟兰; 曾晞

doi:doi：10.3969/j.issn.1004-4957.2019.06.012

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A Phenanthroline Based Fluorescence Probe for Identification of Hg2+and Ag+ in Pure Aqueous Medium

- A Phenanthroline Based Fluorescence Probe for Identification of Hg2+and Ag+ in Pure Aqueous Medium
- Vol. 38, Issue 6, Pages: 706-711(2019)
- 作者机构：
  
  1. 贵州省大环化学及超分子化学重点实验室
  2. 贵州大学化学与化工学院
- 作者简介：
- 基金信息：
- DOI：doi：10.3969/j.issn.1004-4957.2019.06.012
  CLC：
- Published：2019
- 稿件说明：
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廖贤, 袁剑英, 牟兰, 曾晞. A Phenanthroline Based Fluorescence Probe for Identification of Hg2+and Ag+ in Pure Aqueous Medium[J]. 2019, 38(6): 706-711.
DOI：

廖贤, 袁剑英, 牟兰, 曾晞. A Phenanthroline Based Fluorescence Probe for Identification of Hg2+and Ag+ in Pure Aqueous Medium[J]. 2019, 38(6): 706-711. DOI： doi：10.3969/j.issn.1004-4957.2019.06.012.

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。

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.

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