Fluorescent switch for fast and selective detection of mercury (II) ions in vitro and in living cells and a simple device for its removal
2014; Elsevier BV; Volume: 125; Linguagem: Inglês
10.1016/j.talanta.2014.02.063
ISSN1873-3573
AutoresYue Yuan, Shenlong Jiang, Qingqing Miao, Jia Zhang, Mengjing Wang, Linna An, Qinjingwen Cao, Yafeng Guan, Qun Zhang, Gaolin Liang,
Tópico(s)Electrochemical Analysis and Applications
ResumoA 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 1 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.
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