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首页> 外文期刊>Optical Materials >Two pH-responsive fluorescence probes based on indole derivatives
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Two pH-responsive fluorescence probes based on indole derivatives

机译：基于吲哚衍生物的两种pH响应荧光探针

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摘要

Two new pH fluorescent probes 2,8-bis((E)-2-(1,1-dimethyl-1H-benzo[e]indol-2-yl)vinyl)-6H,12H-5,11-methanodibenzo[b,f] [1,5]diazocine (1) and 2,8-bis((E)-2-(3,3-dimethyl-3H-indol-2-yl)vinyl)-6H,12H-5,11-methanodibenzo[b,f] [1,5]diazocine (2) were designed and synthesized via ethylene bridging of the Troger's Base (TB) framework and indole derivatives. As the protonation of nitrogen atoms of indole derivatives, both probes displayed the significant pH-dependent spectral properties. The probing behavior toward pH variations indicated that probes exhibited excellent pH dependent behavior in the pH ranges of 2.07-7.01 (1) and 1.96-7.01 (2), especially possessing good linear response in the pH ranges of 2.50-4.00. The emissions of 1 can be reversibly switched between brilliant yellow and dark states by protonation and deprotonation. Also, the yellow-green fluorescence emission of 2 could be quenched upon protonation. Such behaviors enable them to work as turn-off fluorescent pH sensors in the solution state. Furthermore, protonation and deprotonation on indole moiety nitrogen of the probe 1 and 2 provided a sensing mechanism for pH changes. In addition, both probes performed good photostability, high selectivity and excellent reversibility.
机译：两种新的pH荧光探针2,8-双（（e）-2-（1,1-二甲基-1H-苯并[e]吲哚-2-基）乙烯基）-6h，12h-5,11-甲基二苯并[b ，F] [1,5]二唑（1）和2,8-双（（E）-2-（3,3-二甲基-3H-吲哚-2-基）乙烯基）-6H，12H-5,11 -Methanodibenzo [B，F]通过乙烯桥接（TB）框架和吲哚衍生物的乙烯桥接设计和合成了二唑（2）。作为吲哚衍生物的氮原子的质子化，两种探针都显示出显着的pH依赖性光谱性能。对pH变异的探测行为表明，探针在2.07-7.01（1）和1.96-7.01（2）的pH范围内表现出优异的pH依赖性行为，特别是在2.50-4.00的pH范围内具有良好的线性反应。通过质子化和去质子化，可以在辉煌的黄色和黑暗状态之间可逆地切换1的排放。此外，2的黄绿色荧光发射可以在质子化上淬灭。此类行为使其能够在解决方案状态下作为关闭荧光pH传感器。此外，对探针1和2的吲哚部分氮的质子化和去质子化提供了对pH变化的感测机制。此外，两个探针表现出良好的光稳定性，高选择性和优异的可逆性。

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  • 来源
    《Optical Materials》 |2019年第4期|257-263|共7页
  • 作者

    Li Jinyan; Zhuge Xiangxue; Yan Xiangzhen; Li Yexin; Yuan Chunxue;

  • 作者单位

    Tongii Univ Coll Mat Sci & Engn Caoan Rd 4800 Shanghai 201804 Peoples R China;

    Tongii Univ Coll Mat Sci & Engn Caoan Rd 4800 Shanghai 201804 Peoples R China;

    Tongji Univ Shanghai Engn Res Ctr Tooth Restorat & Regenerat Sch & Hosp Stomatol Dept Periodontol Shanghai 200072 Peoples R China;

    Univ Jinan Sch Chem & Chem Engn West Rd Nan Xinzhuang 336 Jinan 250022 Shandong Peoples R China;

    Tongii Univ Coll Mat Sci & Engn Caoan Rd 4800 Shanghai 201804 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sensors; Luminescence; pH detection; Fluorescent probe; Indole derivatives;

    机译：传感器;发光;pH检测;荧光探针;吲哚衍生物;

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