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Sensitive and fast fluorescence-based indirect sensing of TATP

机译:基于敏感和快速荧光的TATP间接感测

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摘要

Sensing of TATP vapours via the decomposition product, hydrogen peroxide, was achieved using a fluorescence turn-on mechanism through conversion of boronate esters to phenoxides under basic conditions in solid-state films. High sensitivity was achieved with two new fluorenylboronate esters comprising either 2,4-difluorophenyl or 4-(trifluoromethyl)phenyl substituents. The key to the sensitivity was the fact that the phenoxide anion products from the hydrogen peroxide oxidation absorbed at longer wavelengths than the starting boronate esters. Selective excitation of the phenoxide anions avoided the background fluorescence from the corresponding boronate esters. The use of the electron withdrawing substituents also led to greater photostability. The derivative containing the 4-(trifluoromethyl)phenyl moiety was found to give the most stable phenoxide, and demonstrated fast fluorescence turn-on kinetics with a lower limit of detection of approximate to 2.5 ppb in 60 s.
机译:通过在固态膜的基本条件下,使用荧光开启机理实现通过分解产物,通过过氧化氢的分解产品进行过氧化氢的检测。 用两种新的芴基硼酸酯酯,包含包含2,4-二氟苯基或4-(三氟甲基)苯基取代基的高敏感性。 敏感性的关键是,来自过氧化氢氧化的苯氧化物阴离子产物在比起始硼酸酯更长的波长下吸收。 苯氧化物阴离子的选择性激发避免了来自相应的硼酸酯的背景荧光。 使用抽出取代基的使用也导致更大的光稳定性。 发现含有4-(三氟甲基)苯基部分的衍生物给出最稳定的苯氧化物,并展示了60 s中近似检测到2.5ppb的下限的快速荧光导数动力学。

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  • 来源
    《RSC Advances》 |2019年第12期|共11页
  • 作者单位

    Univ Queensland Ctr Organ Photon &

    Elect Sch Chem &

    Mol Biosci Brisbane Qld 4072 Australia;

    Univ Queensland Ctr Organ Photon &

    Elect Sch Chem &

    Mol Biosci Brisbane Qld 4072 Australia;

    Univ Queensland Ctr Organ Photon &

    Elect Sch Chem &

    Mol Biosci Brisbane Qld 4072 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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