Issue 5, 2013
From the journal:

Journal of Materials Chemistry C

Facile and rapid synthesis of water-soluble fluorescent gold nanoclusters for sensitive and selective detection of Ag+†

Jian Sun,a   Yuan Yue,b   Ping Wang,a   Haili Heac  and  Yongdong Jin*a  

* Corresponding authors

a State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China
E-mail: ydjin@ciac.jl.cn
Fax: +86-431-85262661
Tel: +86-431-85262661

b State Key Laboratory of Supramolecular Structure and Materials, Jilin University, No. 2699 Qianjin Street, Changchun 130012, Jilin, China

c University of Chinese Academy of Sciences, Beijing 100039, China

Abstract

We report a direct one-pot approach, employing tetrakis(hydroxymethyl)phosphonium chloride (THPC) and 11-mercaptoundecanoic acid (11-MUA) as combined reducing/capping agents, for the rapid preparation of fluorescent gold nanoclusters (AuNCs) from HAuCl4 in aqueous solution at room temperature. The as-prepared AuNCs exhibit a fluorescence emission at 535 nm, a quantum yield of 1.8% and average diameters of 2.0 ± 0.5 nm. The resultant MUA/THPC–AuNCs have been exploited, for the first time, for the highly sensitive and selective detection of silver ions (Ag+) in aqueous solution when using EDTA as a masking agent for Hg2+. The fluorescence intensity quenches linearly within the range of 25 nM to 3 μM with high sensitivity (LOD = 9 nM, S/N = 3) and this sensing system has been applied for environmental water sample analysis.

Graphical abstract: Facile and rapid synthesis of water-soluble fluorescent gold nanoclusters for sensitive and selective detection of Ag+

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Article information

DOI
https://doi.org/10.1039/C2TC00207H
Article type
Paper
Submitted
17 Sep 2012
Accepted
19 Nov 2012
First published
20 Nov 2012

J. Mater. Chem. C, 2013,1, 908-913

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Facile and rapid synthesis of water-soluble fluorescent gold nanoclusters for sensitive and selective detection of Ag+

J. Sun, Y. Yue, P. Wang, H. He and Y. Jin, J. Mater. Chem. C, 2013, 1, 908 DOI: 10.1039/C2TC00207H

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