将发光多孔芳香骨架集成到指示剂纸中，用于简便、快速和选择性检测硝基化合物。
Integrating a Luminescent Porous Aromatic Framework into Indicator Papers for Facile, Rapid, and Selective Detection of Nitro Compounds.
机构信息
College of Chemistry, Liaoning University, Shenyang 110036, China.
School of Environmental Science, Liaoning University, Shenyang 110036, China.
出版信息
Molecules. 2022 Sep 22;27(19):6252. doi: 10.3390/molecules27196252.
Porous aromatic framework materials with high stability, sensitivity, and selectivity have great potential to provide new sensors for optoelectronic/fluorescent probe devices. In this work, a luminescent porous aromatic framework material (LNU-23) was synthesized via the palladium-catalyzed Suzuki cross-coupling reaction of tetrabromopyrene and 1,2-bisphenyldiborate pinacol ester. The resulting PAF solid exhibited strong fluorescence emission with a quantum yield of 18.31%, showing excellent light and heat stability. Because the lowest unoccupied molecular orbital (LUMO) of LNU-23 was higher than that of the nitro compounds, there was an energy transfer from the excited LNU-23 to the analyte, leading to the selective fluorescence quenching with a limit of detection (LOD) ≈ 1.47 × 10 M. After integrating the luminescent PAF powder on the paper by a simple dipping method, the indicator papers revealed a fast fluorescence response to gaseous nitrobenzene within 10 s, which shows great potential in outdoor fluorescence detection of nitro compounds.
具有高稳定性、灵敏度和选择性的多孔芳香骨架材料在为光电/荧光探针器件提供新型传感器方面具有巨大潜力。在这项工作中，通过钯催化的四溴芘与 1,2-双(苯硼酸频哪醇酯)的Suzuki 交叉偶联反应合成了发光多孔芳香骨架材料（LNU-23）。所得 PAF 固体表现出强荧光发射，量子产率为 18.31%，显示出优异的光热稳定性。由于 LNU-23 的最低未占据分子轨道（LUMO）高于硝基化合物，因此存在从激发态 LNU-23 到分析物的能量转移，导致选择性荧光猝灭，检出限（LOD）≈1.47×10-6 M。通过简单的浸渍法将发光 PAF 粉末集成到纸上后，指示纸对气态硝基苯在 10 秒内显示出快速的荧光响应，这表明其在户外硝基化合物的荧光检测方面具有巨大潜力。
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