高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (2): 20210660.doi: 10.7503/cjcu20210660

• 分析化学 • 上一篇    下一篇

喹啉酮-香豆素类Hg2+比色荧光探针的合成及应用

唐倩, 但飞君(), 郭涛, 兰海闯   

  1. 三峡大学生物与制药学院, 宜昌 443002
  • 收稿日期:2021-09-13 出版日期:2022-02-10 发布日期:2021-10-19
  • 通讯作者: 但飞君 E-mail:973401309@qq.com
  • 基金资助:
    湖北省教育厅科学技术研究计划重点项目(D20211206)

Synthesis and Application of Quinolinone-coumarin-based Colorimetric Fluorescent Probe for Recognition of Hg2+

TANG Qian, DAN Feijun(), GUO Tao, LAN Haichuang   

  1. College of Biological and Pharmaceutical Sciences,China Three Gorges University,Yichang 443002,China
  • Received:2021-09-13 Online:2022-02-10 Published:2021-10-19
  • Contact: DAN Feijun E-mail:973401309@qq.com
  • Supported by:
    the Major Project of Science and Technology Research Program of Hubei Provincial Department of Education, China(D20211206)

摘要:

设计合成了新型喹啉酮-香豆素类比色荧光探针7-二乙氨基-3-[3-(7-二乙氨基)香豆素基-3-氧代丙烯基]喹啉-2-酮(QCO), 用于检测水溶液中的Hg2+. 探针QCO对Hg2+表现出高选择性和强抗干扰性. 此外, Hg2+引起探针QCO溶液的颜色变化明显, 可裸眼识别. 比色法中, 吸收值比(A500/A380)与Hg2+浓度呈良好的线性关系, 其检出限为2.62×10-8 mol/L. 荧光法中, 探针QCO对Hg2+的检出限为5.42×10-8 mol/L. 经等摩尔变化( Job’s Plot)法、 质谱及红外光谱验证, 探针QCO与Hg2+形成络合比为1∶1(摩尔比)的络合物. 硅胶板实验和加标回收率实验结果表明, 探针QCO可用于检测实际水样中的Hg2+.

关键词: 喹啉酮-香豆素, Hg2+, 荧光探针, 水样

Abstract:

A novel quinolinone-coumarin probe, 7-diethylamino-3-[3-(7-diethylamino) coumarinyl-3-oxopropenyl] quinolin-2-one(QCO), was designed and synthesized for the detection of Hg2+ in an aqueous solution. QCO exhibited high selectivity and strong anti-interference for Hg2+. In addition, Hg2+ caused significant color changes of QCO solution, which could be identified with the naked eye. In the colorimetric method, the absorbance ratio A500/A380 had a good linear relationship with the Hg2+ concentration, and its detection limit was 2.62×10-8 mol/L. In the fluorescence method, the detection limit of probe QCO for Hg2+ was 5.42×10-8 mol/L. The stoichiometry of 1∶1(molar ratio) between QCO and Hg2+ was verified by Job's plot, MS and IR methods. Most remarkably, QCO could be used to detect Hg2+ in practical application by silicone board experiments and the standard recovery tests.

Key words: Quinolinone-coumarin, Hg2+, Fluorescent probe, Water sample

中图分类号: 

TrendMD: