Monodentate AIEgen Anchored on Metal‐Organic Framework for Fast Fluorescence Sensing of Phosphate,Chinese Journal of Chemistry

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Monodentate AIEgen Anchored on Metal‐Organic Framework for Fast Fluorescence Sensing of Phosphate
Chinese Journal of Chemistry ( IF 5.5 ) Pub Date : 2020-08-28 , DOI: 10.1002/cjoc.202000364
Xinli Gao ₁ , Lei Pei ₂ , Wenjuan Xue ₃ , Hongliang Huang ₃ , Zhuqing Gao ₂ , Xudong Zhao ₂

Affiliation

Herein, a novel sensor (TPE‐UiO‐66) was designed via anchoring monodentate tetraphenylethylene (TPE) onto UiO‐66 framework. The combination of the distinct aggregation‐induced emission (AIE) of TPE and the easy replacement of monodentate linker by guest phosphate, makes TPE‐UiO‐66 an ideal platform for sensing HPO₄^2–. Experimental results indicate that TPE‐UiO‐66 can selectively sense HPO₄^2– from other common anions. The limit of detection (LOD) can reach to 5.56 μmol·L^–1 and more importantly, TPE‐UiO‐66 also exhibits an ultra‐fast equilibrium response of 2 min, far faster than those of other sensors especially for UiO‐66‐NH₂. The combination of experimental analysis and density functional theory (DFT) calculations demonstrates that the high selectivity, high sensitivity and fast response of HPO₄^2– detection by TPE‐UiO‐66 can be attributed to the stronger coordination interactions of HPO₄^2– with Zr‐O cluster of UiO‐66 than that of TPE molecule. This study not only provides a potential probe for phosphate, but also represents a novel strategy to design stimuli‐responsive fluorescent MOF‐based sensors via using monodentate AIEgens.

中文翻译：

单齿AIEgen锚定在金属有机骨架上，用于快速荧光检测磷酸盐

在本文中，通过将单齿四苯乙烯（TPE）固定在UiO-66框架上，设计了一种新型传感器（TPE-UiO-66）。TPE独特的聚集诱导发射（AIE）和容易被客体磷酸盐取代单齿接头的组合，使TPE-UiO-66成为检测HPO ₄^2-的理想平台。实验结果表明，TPE-UiO-66可以选择性地从其他常见阴离子中感测HPO ₄^2-。检测限（LOD）可以达到5.56μmol·L ^–1，更重要的是，TPE-UiO-66还具有2分钟的超快平衡响应，远快于其他传感器，特别是对于UiO-66- NH ₂。实验分析和密度泛函理论（DFT）计算的结合表明，通过TPE-UiO-66检测HPO ₄^2–的高选择性，高灵敏度和快速响应可归因于HPO ₄^2–与HPE ₄^2–的更强协调相互作用。UiO-66的Zr-O簇比TPE分子的Zr-O簇。这项研究不仅提供了潜在的磷酸盐探针，而且代表了一种通过使用单齿AIEgens设计基于刺激性MOF荧光传感器的新颖策略。

更新日期：2020-08-28

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