Silver nanoclusters functionalized with Ce(III) ions are a viable “turn-on-off” fluorescent probe for sulfide

被引：0
作者：
Jinshui Liu
Huijuan Bao
Dik-Lung Ma
Chung-Hang Leung
机构：
[1] Anhui Normal University,College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo/Biosensing, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule
[2] Hong Kong Baptist University,based Materials
[3] University of Macau,Department of Chemistry
来源：
Microchimica Acta | 2019年 / 186卷
关键词：
Fluorescence; Nanoclusters; Fluorescence quenching; Sulfide probe; Nanomaterial; Glutathione; Etching method;
D O I：
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中图分类号：
学科分类号：
摘要：
The authors show that silver nanoclusters functionalized with Ce(III) ions are a viable fluorescent probe for selective and sensitive detection of sulfide at pH 7.0. The blue fluorescence of silver nanoclusters (with excitation/emission peaks at 358/426 nm) is enhanced on the addition of Ce(III) ions but is quenched in the presence of a trace concentrations of sulfide. A fluorometric assay was worked out using the Ce(III)/AgNCs as the probe. Sulfide can be detected in concentrations up to 2.0 μM, and the detection limit is 15 nM. The method was successfully applied to the determination of sulfide in spiked real samples.
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