Synthesis of cysteine-functionalized water-soluble luminescent copper nanoclusters and their application to the determination of chromium(VI)

被引：2
作者：
Malin Cui
Ge Song
Chan Wang
Qijun Song
机构：
[1] Jiangnan University,The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering
[2] China Agricultural University,College of Science
来源：
Microchimica Acta | 2015年 / 182卷
关键词：
Copper nanoclusters; Cysteine; Quenching; Chromium(VI); Fluorescence; Nanomaterial;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A facile, one-pot green method is presented for the preparation of water-soluble luminescent copper nanoclusters (Cu-NCs) from copper dichloride and cysteine as the precursor and stabilizer, respectively. The Cu-NCs are characterized by high resolution transmission electron microscopy, X-ray photoelectron spectroscopy, fluorescence, UV–Vis, and Raman spectroscopy. The Cu-NCs have an average size of 3.5 nm and are stable in aqueous solution at least for 2 weeks. Under photo excitation with 365 nm light, the Cu-NCs display strong green fluorescence with the maximum of emission at 490 nm and a quantum yield of 5.6 %. Fluorescence is quenched by Cr(VI) ion, and this effect was exploited to develop a highly selective method for the determination of Cr(VI). The detection limit of this probe is as low as 43 nM.
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页码：1371 / 1377
页数：6
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