A carbonothioate‐based highly selective fluorescent probe with a large Stokes shift for detection of Hg2+

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Abstract
Mercury (Hg) is one of the heavy metal pollutants in the environment. Even a very small amount of mercury can cause serious harm to human beings. Herein, we reported a new carbonothioate‐based fluorescent probe for the detection of Hg2+ without interference from other metal ions. This probe possessed a very large Stokes shift (192 nm), which could improve the detection sensitivity by minimizing the interferences resulted from self‐absorption or auto‐fluorescence. With the addition of Hg2+ to the probe solution, considerable fluorescence enhancement was observed. Additionally, the Hg2+ concentration of 0–16 μM and fluorescence intensity showed a good linear relationship (y = 22106× + 53108, R2 = 0.9955). Finally, the proposed probe was used to detect Hg2+ in real water samples, and its result was satisfactory. Therefore, our proposed probe would provide a promising method for the determination of Hg2+ in the environment.
Funding Information
  • Ministry of Water Resources Public Welfare Industry Research Special Project (201401001)
  • Major Livelihood Projects of Jinan (SHMS2015-3-01)
  • Shandong Province Key Research and Development Project (2016GSF117010)
  • Outstanding Young Scientists Award Fund of Shandong Province (BS2013HZ007)

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