Liu Rong, Wang Zhiya, Hu Xinyao, Tang Haitao, Deng Ningjie, Liu Shiquan, Wu Zhaoyang
Hunan Provincial Key Lab of Dark Tea and Jin-Hua, College of Chemistry and Material Engineering, Hunan City University, Yiyang, 413000, People's Republic of China.
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People's Republic of China.
Mikrochim Acta. 2025 Feb 12;192(3):155. doi: 10.1007/s00604-025-06990-9.
A novel smartphone-assisted fluorescence sensor was prepared for determination of antimony ions (Sb). It was synthesized by encapsulating glutathione (GSH)-decorated gold nanoclusters (AuNCs) into zeolitic imidazolate frameworks (ZIF-8) (denoted as AuNCs/ZIF-8). Based on the strong fluorescence quenching caused by the addition of Sb ions, the AuNCs/ZIF-8 was designed for determination of Sb ions. The basic reason for fluorescence quenching of AuNCs caused by Sb ions is the reduction of Au (I) to Au (0), which is proved by the XPS. Mercury ions (Hg) and copper ions (Cu), the common interfering ions that can cause the strong quenching of AuNCs, can be masked by sodium borohydride (NaBH) and diethylene triamine pentaacetic acid (DTPA), respectively. Therefore, the prepared fluorescent sensor of AuNCs/ZIF-8 has high selectivity to the Sb ions. Under the optimal conditions, this proposed fluorescence sensor exhibited good linearity in the concentration range 1.25 × 10 to 7.5 × 10 M with a limit of detection of 3.13 × 10 M. Furthermore, this portable smartphone-assisted sensing platform based on AuNCs/ZIF-8 has the advantages of significant simplification and speeds of the operation process, which provides a new analytical method for real-time determination analysis of Sb ions in real samples.
制备了一种新型的智能手机辅助荧光传感器用于测定锑离子（Sb）。它是通过将谷胱甘肽（GSH）修饰的金纳米簇（AuNCs）封装到沸石咪唑酯骨架（ZIF-8）中合成的（表示为AuNCs/ZIF-8）。基于加入Sb离子引起的强烈荧光猝灭，设计了AuNCs/ZIF-8用于测定Sb离子。Sb离子导致AuNCs荧光猝灭的基本原因是Au（I）还原为Au（0），这通过XPS得到了证实。汞离子（Hg）和铜离子（Cu）这两种能引起AuNCs强烈猝灭的常见干扰离子，可分别用硼氢化钠（NaBH）和二乙烯三胺五乙酸（DTPA）进行掩蔽。因此，所制备的AuNCs/ZIF-8荧光传感器对Sb离子具有高选择性。在最佳条件下，该荧光传感器在1.25×10至7.5×10 M的浓度范围内表现出良好的线性，检测限为3.13×10 M。此外，这种基于AuNCs/ZIF-8的便携式智能手机辅助传感平台具有操作过程显著简化和速度快的优点，为实际样品中Sb离子的实时测定分析提供了一种新的分析方法。
