Cu/Ag纳米簇比率型荧光探针的构建及其在Ag^+检测中的应用

Construction of Cu/Ag Nanocluster-Based Ratio Fluorescent Probe and Its Application to the Detection of Ag^+

本文以D-青霉胺为配体,通过一锅法在室温下制备出对Ag^+具有选择性识别作用的Cu/Ag纳米簇(Cu/AgNCs)比率型荧光探针,并对其结构和光谱学性质进行了详细研究。结果表明,该探针的荧光随着Ag^+掺杂量的增加显示出明显的蓝移,在最佳实验条件下,探针的荧光比率(I570/I615)与Ag^+浓度在0~1 600μmol/L范围内呈良好的线性关系,检出限(S/N=3)为0.9μmol/L,并对多种常见金属离子具有较好的抗干扰能力。该方法已被成功地用于人体尿样和环境水样中Ag^+的测定。

In this paper,Cu/Ag nanoclusters（Cu/AgNCs）-based fluorescent probes were prepared at room temperature with D-penicillamine as a ligand by a one-pot method,which had highly selective recognition of Ag~＋.The structure and spectroscopic properties were characterized.The luminescence of the probe showed a clear blue shift with increasing Ag~＋ doping amounts,and its mechanism also has been analyzed.The results indicate that under optimal conditions,there is good linear relationship between the ratio of emission intensity（I_（570）/I_（615））and the silver ion concentration（0-1 600μmol/L）with the detection limit of 0.9μmol/L.Moreover,other common metal ions almost have no interference on the detection of silver ions.Our method has been successfully used for the determination of Ag＋in human urine samples and environmental water samples.