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Cytidine-stabilized copper nanoclusters as a fluorescent probe for sensing of copper ions and hemin

机译：胞嘧啶稳定的铜纳米团簇，用作检测铜离子和血红素的荧光探针

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We reported a sensitive and selective fluorescence “turn on–off” strategy for detection of Cu ~(2+) and hemin, respectively. The fluorescence “turn on” sensor for Cu ~(2+) detection had a wide linear range of 0.05–2.0 μM with a limit of detection (LOD) of 0.032 μM, and the fluorescence “turn off” sensor for hemin detection possessed a wide linear range of 0.05–4.0 μM with an LOD of 0.045 μM. The sensor for Cu ~(2+) or hemin exhibited high selectivity over other possible substances. In addition, it was demonstrated by using various analytical characterization techniques that the fluorescence “turn on” sensor for Cu ~(2+) was constructed on the basis of the formation of water-soluble fluorescent copper nanoclusters (CuNCs), and the fabrication of the fluorescence “turn off” sensor for hemin was predominately based on the inner filter effect of hemin on the fluorescence of the CuNCs. Finally, the proposed fluorescence “turn on–off” sensor system was successfully applied for detection of Cu ~(2+) in lake water samples and hemin in duck blood samples.
机译：我们报道了一种敏感和选择性的荧光“开-关”策略，分别用于检测Cu〜（2+）和血红素。用于Cu〜（2+）检测的荧光“打开”传感器具有0.05–2.0μM的宽线性范围，检测限（LOD）为0.032μM，用于血红素检测的荧光“关闭”传感器具有0.05-4.0μM的宽线性范围，LOD为0.045μM。 Cu〜（2+）或血红素的传感器对其他可能的物质表现出很高的选择性。另外，通过使用各种分析表征技术证明，在水溶性荧光铜纳米团簇（CuNCs）的形成和制备过程中，构建了Cu〜（2+）的荧光“开启”传感器。血红素的荧光“关闭”传感器主要基于血红素对CuNCs荧光的内部过滤作用。最终，所提出的荧光“开关”传感器系统成功地用于检测湖水样品中的铜〜（2+）和鸭血样品中的血红素。

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