In this contribution, we established a simple, green, fast and cost‐effective strategy to prepare green‐emitting fluorescence copper nanoclusters (Cu NCs) by using histidine as a stabilizer and ascorbic acid as a reducing agent. A series of characterization methods including fluorescence spectroscopy, UV‐vis absorption spectroscopy, fourier transform infrared spectroscopy (FT‐IR), transmission electron microscopy (TEM) and X‐ray photoelectron spectroscopy (XPS) were used to characterize the Cu NCs. The histidine‐capped Cu NCs (His‐Cu NCs) was well dispersed and exhibited good water solubility, excellent photostability and salt resistance. Interestingly, it was discovered that tetracycline caused a sensitive and selective decline in the fluorescence intensity of His‐Cu NCs for the first time. The proposed analysis system showed a wide linear range from 0.1 to 110 μM, and the detection limit was 0.047 μM. After that, the fluorescent assay was successfully employed to analyze tetracycline in lake water samples.

中文翻译：

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基于组氨酸模板化铜纳米簇的高效四环素荧光探针

在这项贡献中，我们建立了一种简单，绿色，快速且经济高效的策略，通过使用组氨酸作为稳定剂和抗坏血酸作为还原剂来制备发射绿色荧光的铜纳米簇（Cu NCs）。Cu NCs的表征方法包括荧光光谱，紫外可见吸收光谱，傅立叶变换红外光谱（FT-IR），透射电子显微镜（TEM）和X射线光电子能谱（XPS）。组氨酸封端的Cu NCs（His-Cu NCs）分散良好，具有良好的水溶性，优异的光稳定性和耐盐性。有趣的是，发现四环素首次引起His-Cu NCs荧光强度的敏感和选择性下降。拟议的分析系统显示了0.1至110μM的宽线性范围，检出限为0.047μM。此后，荧光分析成功地用于分析湖水样品中的四环素。