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Fluorescent switch for fast and selective detection of mercury (II) ions in vitro and in living cells and a simple device for its removal



Fluorescent switch for fast and selective detection of mercury (II) ions in vitro and in living cells and a simple device for its removal



Talanta 125: 204-209



A water-soluble, biocompatible, and fluorescent chemosensor (1) for label-free, simple, and fast detection of mercury ions (Hg(2+)) in aqueous solutions and in HepG2 cells with high selectivity is reported herein. Chelation of 1 with Hg(2+) results in the disappearance of its fluorescence emission at 350 nm and the appearance of a new emission at 405 nm. Selectivity and interference studies indicated that 1 could be selectively chelated by Hg(2+) without interference from other metal ions. Insight into the mechanisms responsible for its fluorescence effect was gained from ultrafast transient absorption spectroscopy. With these properties, 1 was successfully applied for imaging Hg(2+) in living cells and for removing Hg(2+) from river water. Moreover, we also constructed a simple device for fast and effective removal of Hg(2+) from contaminated liquid samples.

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Accession: 053268151

Download citation: RISBibTeXText

PMID: 24840434

DOI: 10.1016/j.talanta.2014.02.063


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