Abstract：
A new type of polyethyleneimine-protected copper nanoclusters (PEI-CuNCs) is favorably developed by a one-pot method under mild conditions. The obtained PEI-CuNCs is characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, Fourier-transform infrared (FTIR) spectroscopy and other techniques. It is worth noting that the proposed PEI-CuNCs demonstrate a selective response to chromium(VI) over other competitive species. Fluorescence quenching of PEI-CuNCs is determined to be chromium(VI) concentrations dependence with a low limit of detection of 8.9 nM. What is more, the as-developed PEI-CuNCs is further employed in building a detection platform for portable recognition of chromium(VI) in real samples with good accuracy. These findings may offer a distinctive strategy for the development of methods for analyzing and monitoring chromium(VI) and expand their application in real sample monitoring.
摘要：
在温和条件下通过一锅法有利地开发了一种新型的聚乙烯亚胺保护的铜纳米簇（PEI-CuNC）。所得PEI-CuNCs经X射线衍射表征,X射线光电子能谱,透射电子显微镜,傅里叶变换红外(FTIR)光谱等技术。值得注意的是,所提出的PEI-CuNC表现出对铬(VI)的选择性响应优于其他竞争性物种。测定PEI-CuNC的荧光猝灭是铬(VI)浓度依赖性的,检测下限为8.9nM。更重要的是，开发的PEI-CuNCs进一步用于构建检测平台，用于便携式识别实际样品中的铬（VI），具有良好的准确性。这些发现可能为开发分析和监测铬（VI）的方法提供了独特的策略，并扩展了其在实际样品监测中的应用。
