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Label-free detection of Pb2+ based on aggregation-induced emission enhancement of Au-nanoclusters

机译：基于聚集诱导的金纳米团簇发射增强的Pb2 +无标记检测

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Interestingly, the glutathione capped Au-nanoclusters presented here showed a unique optical performance compared with their homological AuNPs with larger size. The luminescence intensity of the AuNCs could be enhanced due to the formation of aggregates. The AuNCs were then employed as a visual probe for the detection of Pb2+ based on the aggregation-induced emission enhancement (AIEE) property of the AuNCs. When the luminous glutathione capped AuNCs probes encountered Pb2+ ions, they rapidly formed aggregates through GSH-Pb2+ interaction in 1 minute, resulting in an enhanced luminescence intensity. The enhanced luminescence intensities showed a linear dependence on the concentrations of Pb2+ with satisfactory selectivity towards 12 kinds of divalent metal ions. More importantly, the probe can also be used for on-site testing to inspect Pb2+ contamination by using a portable UV flashlight.
机译：有趣的是，与更大尺寸的同源AuNPs相比，此处介绍的带有谷胱甘肽加帽的Au-纳米簇显示出独特的光学性能。由于聚集体的形成，可以增强AuNCs的发光强度。然后，基于AuNCs的聚集诱导发射增强（AIEE）特性，将AuNCs用作检测Pb2 +的可视探针。当发光型谷胱甘肽加帽的AuNCs探针遇到Pb2 +离子时，它们在1分钟内通过GSH-Pb2 +相互作用迅速形成聚集体，从而增强了发光强度。增强的发光强度显示出对Pb2 +浓度的线性依赖性，对12种二价金属离子具有令人满意的选择性。更重要的是，该探头还可以用于现场测试，以通过使用便携式紫外线手电筒检查Pb2 +污染。

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