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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Fabrication of a dual-emitting dye-encapsulated metal-organic framework as a stable fluorescent sensor for metal ion detection
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Fabrication of a dual-emitting dye-encapsulated metal-organic framework as a stable fluorescent sensor for metal ion detection

机译：用金属离子检测制备双发射染料封装金属 - 有机框架作为稳定的荧光传感器

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摘要

Dye-loaded metal organic frameworks (MOFs) are regarded as one of the most fascinating luminescent materials for selective chemical sensing. Herein, a facile two-step synthesis procedure is reported for the successful encapsulation of fluorescein dye into porous zinc-adenine metal-organic framework (bio-MOF-1) crystals, and thus the aggregation-caused quenching of dye molecules can be eliminated in the confined MOF structure to further create dual emission centers. The as-prepared solid state fluorescein@bio-MOF-1 composite exhibits both the characteristic emissions of the fluorescein dye and bio-MOF-1, and host-guest energy transfer also occurs. Particularly, depending on the variety of the luminescence intensities of different metal ions incorporated in fluorescein@bio-MOF-1, such a host-guest system could be used for high-sensitive sensing of metal cations, especially for the drastic luminescence quenching of Fe3+ ions. The quenching effect coefficient (K-sv) for every metal ion detected is calculated, and the largest K-sv value for Fe3+ ions is determined to be 5072 M-1. Such an encapsulation strategy can be widely adopted to design new dye@MOF composites with multiple luminescent centers for metal cation sensing.
机译：染料装载的金属有机框架（MOF）被认为是用于选择性化学传感的最迷人的发光材料之一。在此，将据报道，将荧光素染料成功封装成多孔锌 - 腺嘌呤金属 - 有机骨架（Bio-Mof-1）晶体，因此可以消除染料分子的聚集引起的猝灭狭窄的MOF结构进一步创造了双重排放中心。制备的固态荧光素@ Bio-Mof-1复合材料表现出荧光素染料和Bio-Mof-1的特征排放，以及宿主客人能源转移也发生。特别是，取决于掺入荧光素@ Bio-Mof-1中的不同金属离子的发光强度的各种，这种宿主客房系统可用于金属阳离子的高灵敏度感测，特别是对于Fe3 +的激烈发光淬火。离子。计算每个金属离子检测到的淬火效果系数（K-SV），Fe3 +离子的最大K-SV值被确定为5072m-1。这种封装策略可以广泛采用以设计具有多个发光中心的新型染料组合物，用于金属阳离子感测。

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    Zhang Ningzi; Zhang Diwei; Zhao Jing; Xia Zhiguo;

  • 作者单位

    Univ Sci &

    Technol Beijing Beijing Municipal Key Lab New Energy Mat &

    Techno Sch Mat Sci &

    Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Beijing Municipal Key Lab New Energy Mat &

    Techno Sch Mat Sci &

    Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Beijing Municipal Key Lab New Energy Mat &

    Techno Sch Mat Sci &

    Engn Beijing 100083 Peoples R China;

    Univ Sci &

    Technol Beijing Beijing Municipal Key Lab New Energy Mat &

    Techno Sch Mat Sci &

    Engn Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;无机化学;
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