Water-soluble polymer dots formed from polyethylenimine and glutathione as a fluorescent probe for mercury(II)
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Water-soluble fluorescent polymer dots (PDs) were prepared from polyethylenimine and glutathione and are shown to be viable fluorescent probes for selective and sensitive determination of Hg(II). The PDs possess bright blue fluorescence (with excitation/emission peaks at 340/462 nm) which is quenched on addition of Hg(II). Based on these findings, a fluorometric assay was worked out. Fluorescence linearly drops in the 0.1 to 100 μM Hg(II) concentration range, and the limit of detection is 32 nM.
KeywordsHg2+ analysis Environmental samples Industrial waste water Heavy metal ions Electron transfer Stern-Volmer plot Non-conjugated polymers Dynamic quenching
Authors deeply acknowledge financial support for this work from the National Natural Science Foundation of China (No. 21675131), the Municipal Science Foundation of Chongqing City (CSTC-2015jcyjB50001), and the National Undergraduate Training Program for Innovation and Entrepreneurship (No.201610635036).
Compliance with ethical standards
The author(s) declare that they have no competing interests.
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