胞苷保护的铜纳米簇新型荧光探针检测重铬酸根离子

Cytidine-protected Copper Nanoclusters as a Novel Fluorescent Probe for the Detection of Dichromate Anion

基于重铬酸根离子(Cr_2O_7^(2-))对胞苷保护的荧光铜纳米簇(Cu NCs)的猝灭作用,构建了一种可用于检测Cr_2O_7^(2-)的荧光传感器.实验结果表明,该传感体系检测Cr_2O_7^(2-)的线性范围为0.05~7.0μmol/L,检出限为24 nmol/L(S/N=3).该传感器对Cr_2O_7^(2-)的检测具有良好的选择性,可用于湖水样中Cr_2O_7^(2-)的检测.

We constructed a fluorescent sensor for the detection of dichromate anion（ Cr_2O_7^（2-）） on the basis of the quenching effect of Cr_2O_7^（2-）on the fluorescence of cytidine-protected copper nanoclusters（ Cu NCs）. The experimental results showed that the Cr_2O_7^（2-）sensing system provided a linear range of 0. 05—7. 0 μmol/L with a low detection limit（ S/N = 3） of 24 nmol/L. In addition,the sensing system exhibited a good selectivity for Cr_2O_7^（2-）detection,and could be applied for Cr_2O_7^（2-）detection in lake water samples.