NDLI: Ratiometric fluorescent silver nanoclusters for the determination of mercury and copper ions

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Linlin Shangguan, Dihua Liu, Xiangjun Zhang, Nan
Copyright Year	2015
Abstract	A new ratiometric fluorescent nanoprobe based on DNA-stabilized silver nanoclusters (AgNCs) was one-pot synthesized by a simple reduction method. The obtained nanoprobe exhibited two typical green and red emissions of FAM and AgNCs, used as reference and response signals, respectively. Upon the addition of Hg2+ or Cu2+, the red emission of AgNCs was quenched greatly, whereas the green emission of FAM remained constant, resulting in the ratiometric fluorescence determination of Hg2+ and Cu2+. This ratiometric nanoprobe showed good selectivity for Hg2+ and Cu2+ over many other metal ions, and exhibited high sensitivity with a detection limit as low as 1.03 nM and 2.77 nM for Hg2+ and Cu2+, respectively. Moreover, with the aid of a chelating agent, EDTA, this ratiometric fluorescent nanoprobe can discriminate and realize exclusive determination of Hg2+ and Cu2+. This ratiometric fluorescent nanoprobe was successfully applied for the determination of Hg2+ and Cu2+ in real tap water samples.
Starting Page	8019
Ending Page	8024
Page Count	6
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	7
Issue Number	19
Journal	Analytical Methods
DOI	10.1039/c5ay02044a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ethylenediaminetetraacetic acid Fluorescence Chelation
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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