化学
化学发光
发光
氟化物
检出限
荧光
无机化学
光化学
离子
过氧化氢
草酸盐
分析化学(期刊)
物理化学
有机化学
色谱法
物理
量子力学
光电子学
作者
Yuan Sun,Xiaotong Xu,Yaxin Zhao,Haonan Tan,Yinhuan Li,Jianxiu Du
出处
期刊:Talanta
[Elsevier]
日期:2019-11-20
卷期号:209: 120582-120582
被引量:34
标识
DOI:10.1016/j.talanta.2019.120582
摘要
A luminescent metal organic frameworks (MOFs)–based chemiluminescence resonance energy transfer (CRET) platform was constructed for turn–on detection of fluoride ion. A hybrid MOFs was prepared by encapsulating strong fluorescence 2′,7′–dichlorofluorescein (DCF) into the frames of NH2–MIL–101(Al) MOFs, which led to a significant suppression of fluorescence signal of DCF. In the presence of fluoride ion, it destroyed the structure of the hybrid MOFs and released DCF molecules from the frames due to the formation of more stable aluminum hexafluoride complex ions [AlF63−] between fluoride ion and aluminum ion. The released DCF molecules accepted the energy originating from the chemical reaction of bis(2,4,6–trichlorophenyl)oxalate (TCPO) with hydrogen peroxide (H2O2), producing a strong chemiluminescence (CL) emission. The CL signal was strong dependent on the concentration of fluoride ion presented and showed a linear response in the range of 0.5–80.0 μmol L−1 (9.5 μg L−1–1.52 mg L−1). The detection limit was 0.05 μmol L−1 (about 0.95 μg L−1) fluoride ion and the relative standard deviations was 2.3% for 40.0 μmol L−1 fluoride ion solution (n = 11). This MOFs–based CRET method was successfully applied to the determination of fluoride ion in drinking water samples, demonstrating its potential application in analysis of real samples.
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