Liu Xianhu, Chang Yanping, Yao Wanqing, Li Long, Guo Hongwei
Department of Chemistry and Environment, Jiaying University, Meisong Road 100, Meizhou 514015, China.
Nanomaterials (Basel). 2024 Dec 12;14(24):1987. doi: 10.3390/nano14241987.
Direct preparation of silver nanoclusters is of great significance for their applications. In this work, by selecting sodium cyanoborohydride as a weak reducing agent to control the kinetics of the reduction reaction, we successfully prepared silver nanoclusters protected by thiol-containing ligands, including mercaptosuccinic acid, cysteine, and glutathione. Based on the silver nanoclusters protected by mercaptosuccinic acid, silver-gold alloy nanoclusters were obtained through a gold doping reaction. Spectroscopic and particle size analyses showed that the silver-gold alloy nanoclusters exhibited aggregation-induced emission enhancement (AIEE) properties. A fluorescent probe for aluminum ions was developed based on the silver-gold alloy nanoclusters. In the presence of methionine and mercaptoacetic acid, the probe demonstrated good selectivity for aluminum ion detection. The linear range of this detection method was 0 to 192 μM, with a detection limit of 1.6 μM. The working mechanism of this detection method was further investigated through spectroscopic analysis.
直接制备银纳米团簇对其应用具有重要意义。在本工作中，通过选择氰基硼氢化钠作为弱还原剂来控制还原反应的动力学，我们成功制备了由含硫醇配体保护的银纳米团簇，包括巯基琥珀酸、半胱氨酸和谷胱甘肽。基于由巯基琥珀酸保护的银纳米团簇，通过金掺杂反应获得了银金合金纳米团簇。光谱和粒径分析表明，银金合金纳米团簇表现出聚集诱导发光增强（AIEE）特性。基于银金合金纳米团簇开发了一种铝离子荧光探针。在甲硫氨酸和巯基乙酸存在下，该探针对铝离子检测表现出良好的选择性。该检测方法的线性范围为0至192μM，检测限为1.6μM。通过光谱分析进一步研究了该检测方法的作用机制。
