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首页> 外文期刊>Advanced Functional Materials >Luminescent Metal-Organic Frameworks for Selectively Sensing Nitric Oxide in an Aqueous Solution and in Living Cells
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Luminescent Metal-Organic Frameworks for Selectively Sensing Nitric Oxide in an Aqueous Solution and in Living Cells

机译：选择性检测水溶液和活细胞中一氧化氮的发光金属有机骨架

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摘要

Cu~(2+)-based metal-organic framework (Cu-TCA) (H_3TCA = tricarboxytriphenyl amine) having triphenylamine emitters was assembled and structurally characterized. Cu-TCA features a three-dimensional porous structure consolidated by the well-established Cu_2(O_2CR)_4 paddlewheel units with volume of the cavities approximately 4000 nm~3. Having paramagnetic Cu~(2+) ions to quench the luminescence of triphenylamine, Cu-TCA only exhibited very weak emission at 430 nm; upon the addition of NO up to 0.1 mm, the luminescence was recovered directly and provided about 700-fold fluorescent enhancement. The luminescence detection exhibited high selectivity - other reactive species present in biological systems, including H_2O_2, NO_3~-, NO_2~-, ONOO~-, CIO~- and ~1O_2, did not interfere with the NO detection. The brightness of the emission of Cu-TCA also led to its successful application in the biological imaging of NO in living cells. As a comparison, lanthanide metalorganic framework Eu-TCA having triphenylamine emitters and characteristic europium emitters was also assembled. Eu-TCA exhibited ratiometric fluorescent responses towards NO with the europium luminescence maintained as the internal standard and the triphenylamine emission exhibited more than 1000-fold enhancement.
机译：组装并结构表征了具有三苯胺发射体的基于Cu〜（2+）的金属有机骨架（Cu-TCA）（H_3TCA =三羧基三苯胺）。 Cu-TCA具有三维多孔结构，由成熟的Cu_2（O_2CR）_4桨轮单元巩固，腔体的体积约为4000 nm〜3。具有顺磁性的Cu〜（2+）离子可猝灭三苯胺的发光，Cu-TCA仅在430 nm处显示出非常弱的发射。在添加最高达0.1 mm的NO时，可直接恢复发光，并提供约700倍的荧光增强。发光检测显示出高选择性-生物系统中存在的其他反应物种，包括H_2O_2，NO_3〜-，NO_2〜-，ONOO〜-，CIO〜-和〜1O_2，不会干扰NO检测。 Cu-TCA发射的亮度也导致其成功应用于活细胞中NO的生物成像。作为比较，还组装了具有三苯胺发射体和特征性emitter发射体的镧系金属有机骨架Eu-TCA。 Eu-TCA在保持towards发光为内标的情况下显示出对NO的比例荧光响应，三苯胺的发射增强了1000倍以上。

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  • 来源
    《Advanced Functional Materials》 |2012年第8期|p.1698-1703|共6页
  • 作者

    Pengyan Wu; Jian Wang; Cheng He; Xiaolin Zhang; Yanting Wang; Tao Liu; Chunying Duan;

  • 作者单位

    State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian, 116012, China;

    State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian, 116012, China;

    State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian, 116012, China;

    State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian, 116012, China;

    State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian, 116012, China;

    State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian, 116012, China;

    State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian, 116012, China;

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