摘要
以2-苯并噻唑-5-甲基苯酚为原料,合成了一种基于次氯酸根离子的比率型荧光探针ZN1,并对其进行了次氯酸根离子的检测性能测试。结果表明:该探针可以快速灵敏、选择性地识别次氯酸根离子,其检测下限为0.96μmol/L,并将该探针应用于实际水样中次氯酸根离子含量的检测,在自来水、雨水中的回收率均大于84%。此外,利用质谱和核磁谱图开展的检测机理研究表明,探针的识别机理与次氯酸的氧化脱氢作用和激发态分子内质子转移(ESIPT)过程破坏有关。
A novel ratiometric fluorescent probe ZN1 for the detection of hypochlorite ion was synthesized using 2-benzothiazole-5-methylphenol as raw material. The results showed that the synthesized probe exhibited rapid response and good selectivity to hypochlorite ion and its detection limit was 0.96 μmol/L.The probe was then applied for the detection of hypochlorite ion in real water samples. The recovery of hypochlorite ion in tap water and rainwater were more than 84%. In addition, the detection mechanism of the probe was investigated by mass spectrometry and nuclear magnetic spectroscopy. It was found that the recognition mechanism of the probe was related to the oxidative dehydrogenation of hypochlorous acid and the destruction of ESIPT process.
引文
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