合理设计与被分析物具有高光谱重叠的碳点,通过内滤波效应有效检测甲硝唑

Jialuo Zhuang, Zijian Li, Hong-hui Bi
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引用次数: 0

摘要

开发与分析物具有高光谱重叠度的荧光探针有利于通过内滤光片效应实现传感应用,这就需要对其结构和光物理性质进行简便的调整。本文报告了蓝色发射碳点(B-CDs)的合理设计,用于有效检测去离子水和真实水样中的甲硝唑(MNZ)。设计策略基于对前驱体的精心选择,从而可以精确控制 B-CDs 的氮掺杂程度和石墨化含量。因此,制备的 B-CD 通过 IFE 机制对 MNZ 产生了特异而快速的荧光淬灭反应,因为它们的吸收光谱具有良好的重叠性。这种方法的线性范围宽(0.5-160 微米),检测限低(0.1 微米),选择性适中,表明它有望在环境传感领域得到实际应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rational Design of Carbon Dots Featuring High Spectral Overlap with Analyte for Effective Detection of Metronidazole via Inner Filter Effect
The development of fluorescent probe with high spectral overlap with analyte is favorable for the sensing applications via inner filter effect, which requires facile tuning of their structure and photophysical properties. Herein, the rational design of blue emissive carbon dots (B‐CDs) is reported for effective detection of metronidazole (MNZ) in both deionized water and real water samples. The design strategy is based on the elaborate choice of precursors that allows precise control over the nitrogen‐doping degree and graphitization content of B‐CDs. As a result, the as‐prepared B‐CDs exhibit a specific and quick fluorescence quenching response to MNZ via the IFE mechanism because of their good spectral overlap in absorbance. This approach shows a broad linear range (0.5–160 µm), low detection limit (0.1 µm), and moderate selectivity, suggesting its promise for practical applications in environmental sensing.
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