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Selective and Sensitive Detection of Hg2+ and Ag+ by a Fluorescent and Colorimetric Probe with Large Stokes Shift

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Abstract

Development of fluorescent sensors with large Stokes shift for selective detection of heavy metals is of great importance. A novel fluorescent probe with extremely large Stokes shift (212 nm) was synthesized for selective and simultaneous detection of Hg2+ and Ag+ ions. The deep yellow probe turned colorless or pale yellow after addition of Hg2+ or Ag+. The new probe could be utilized for absorption spectral detection of Hg2+ and Ag+ both in ethanol and aqueous solution. Addition of Hg2+ and Ag+ ions caused significant decrease in the fluorescence intensity of the new probe and the selective recognition of Hg2+ and Ag+ was not interfered by common competitive metal ions including Li+, Na+, K+, Cu2+, Fe2+, Zn2+, Co2+, Ni2+, Mn2+, Sr2+, Ca2+, Mg2+, Al3+, Cr3+ and Fe3+. The detection limit for Hg2+ and Ag+ was calculated to be 4.68 μM and 4.29 μM, respectively. Application of the new probe for quantitative determination of Hg2+ and Ag+ concentrations in real water samples was accomplished.

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Funding

The Funding for the Open Research Program of State Key Laboratory of Molecular Engineering of Polymers, Fudan University (K2022-38 to Yanxi Song) is acknowledged.

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, China

    Hongqi Li, Jiabao Yan, Lin Jiang, Jirui Yu & Lang Cheng

  2. School of Chemistry and Material Engineering, Huainan Normal University, Huainan, 232038, Anhui Province, China

    Yong Zhao

  3. College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China

    Yanxi Song

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Hongqi Li, Jiabao Yan and Lin Jiang wrote the main manuscript text; Jiabao Yan, Lin Jiang and Yong Zhao performed research and analyzed the data. Yanxi Song, Jirui Yu and Lang Cheng prepared the figures. All authors reviewed the manuscript.

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Li, H., Yan, J., Jiang, L. et al. Selective and Sensitive Detection of Hg2+ and Ag+ by a Fluorescent and Colorimetric Probe with Large Stokes Shift. J Fluoresc (2023). https://doi.org/10.1007/s10895-023-03478-8

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