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

被引：124

作者：

Cui, Malin ^{[1
]}

Song, Ge ^{[2
]}

Wang, Chan ^{[1
]}

Song, Qijun ^{[1
]}

机构：

[1] Jiangnan Univ, Key Lab Food Colloids & Biotechnol, Minist Educ, Sch Chem & Mat Engn, Wuxi 214122, Peoples R China

[2] China Agr Univ, Coll Sci, Beijing 100091, Peoples R China

来源：

MICROCHIMICA ACTA | 2015年 / 182卷 / 7-8期

基金：

中国国家自然科学基金;

关键词：

Copper nanoclusters; Cysteine; Quenching; Chromium(VI); Fluorescence; Nanomaterial; SELECTIVE COLORIMETRIC DETECTION; PROTEIN-DIRECTED SYNTHESIS; QUANTUM YIELD; CR VI; FLUORESCENT; CR(VI); NANOPARTICLES; EMISSION; PROBE; GAP;

D O I：

10.1007/s00604-015-1458-z

中图分类号：

O65 [分析化学];

学科分类号：

070302 [分析化学];

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.

引用

页码：1371 / 1377

页数：7

共 35 条

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