Journal
TALANTA
Volume 125, Issue -, Pages 204-209Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2014.02.063
Keywords
Mercury (II) detection; Fluorescence switch; Selectivity; Cell imaging; Mercury (II) removal
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Funding
- National Natural Science Foundation of China [21175122, 91127036, 21173205, 91127942]
- Fundamental Research Funds for Central Universities [WK2060190018]
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A water-soluble, biocompatible, and fluorescent chemosensor (1) for label-free, simple, and fast detection of mercury ions (Hg2+) in aqueous solutions and in HepG2 cells with high selectivity is reported herein. Chelation of 1 with Hg2+ 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 I could be selectively chelated by Hg2+ 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 Hg2+ in living cells and for removing Hg2+ from river water. Moreover, we also constructed a simple device for fast and effective removal of Hg2+ from contaminated liquid samples. (C) 2014 Elsevier B.V. All rights reserved.
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