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首页> 外文期刊>Chemistry: A European journal >Highly Luminescent Microporous Organic Polymer with Lewis Acidic Boron Sites on the Pore Surface: Ratiometric Sensing and Capture of F- Ions
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Highly Luminescent Microporous Organic Polymer with Lewis Acidic Boron Sites on the Pore Surface: Ratiometric Sensing and Capture of F- Ions

机译：孔表面具有路易斯酸性硼位的高发光微孔有机聚合物：比率式传感和F离子捕获

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摘要

Reversible and selective capture/detection of F- ions in water is of the utmost importance, as excess intake leads to adverse effects on human health. Highly robust Lewis acidic luminescent porous organic materials have potential for efficient sequestration and detection of F- ions. Herein, the rational design and synthesis of a boron-based, Lewis acidic microporous organic polymer (BMOP) derived from tris(4-bromo-2,3,5,6-tetramethylphenyl)boron nodes and diethynylbiphenyl linkers with a pore size of 1.08nm for selective turn-on sensing and capture of F- ion are reported. The presence of a vacant p orbital on the boron center of BMOP results in intramolecular charge transfer (ICT) from the linker to boron. BMOP shows selective turn-on blue emission for F- ions in aqueous mixtures with a detection limit of 2.6M. Strong B-F interactions facilitate rapid sequestration of F- by BMOP. The ICT emission of BMOP can be reversibly regenerated by addition of an excess of water, and the polymer can be reused several times.
机译：水中F-离子的可逆和选择性捕获/检测至关重要，因为摄入过多会导致对人体健康的不利影响。高度坚固的Lewis酸性发光多孔有机材料具有有效隔离和检测F-离子的潜力。在这里，合理设计和合成的硼基路易斯酸性微孔有机聚合物（BMOP）衍生自三（4-溴-2,3,5,6-四甲基苯基）硼节点和二乙炔联苯连接的孔径为1.08报道了用于选择性开启感测和捕获F-离子的nm值。在BMOP的硼中心存在一个空的p轨道会导致分子内电荷从连接子转移到硼。 BMOP显示水性混合物中F-离子的选择性开启蓝光发射，检测极限为2.6M。强大的B-F相互作用有助于BMOP快速隔离F-。通过添加过量的水，可逆地再生BMOP的ICT排放，并且该聚合物可重复使用多次。

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