Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (2): 20210660.doi: 10.7503/cjcu20210660

• Analytical Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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