Meng Xiaoyu, Cao Linghui, Li Bao
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Semiconductor Chemistry Center, School of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China.
Inorg Chem. 2024 Jan 8;63(1):518-525. doi: 10.1021/acs.inorgchem.3c03401. Epub 2023 Dec 18.
The rapid and selective detection of nitro explosives has become one of the current urgent environmental and safety issues. Fluorescent metal-organic frameworks (MOFs) provide strong support for the development of photoactive materials with excellent sensing performances. In this work, Zn and pyrazinoquinoxaline tetracarboxylic acid with high nitrogen content were selected to construct a MOF structure termed Zn-MOF, which had excellent optical properties. The fluorescence sensing performance of Zn-MOF for nitro explosives was also investigated. The structural advantages of Zn-MOF, such as its porous structure, abundant host-guest interaction sites, and stable framework, ensure the prerequisites for various applications. Zn-MOF is not only capable of responding to a wide range of substrates, such as Fe, CrO, and MnO, to achieve fluorescence quenching detection but also able to achieve sensitive fluorescence sensing behavior for nitro explosives. In particular, for trinitrotoluene, the value can reach 8.72 × 10 M. The results show that the introduction of pyrazinoquinoxaline groups into MOFs can be an effective strategy for the preparation of highly efficient fluorescent sensing materials for nitro explosives.
硝基炸药的快速选择性检测已成为当前紧迫的环境与安全问题之一。荧光金属有机框架材料（MOFs）为开发具有优异传感性能的光活性材料提供了有力支持。在本工作中，选用锌和高氮含量的吡嗪并喹喔啉四羧酸构建了一种名为Zn-MOF的MOF结构，其具有优异的光学性质。还研究了Zn-MOF对硝基炸药的荧光传感性能。Zn-MOF的结构优势，如其多孔结构、丰富的主客体相互作用位点和稳定的框架结构，确保了其各种应用的前提条件。Zn-MOF不仅能够对多种底物（如Fe、CrO和MnO）做出响应，实现荧光猝灭检测，还能够对硝基炸药实现灵敏的荧光传感行为。特别是对于三硝基甲苯，其 值可达8.72×10 M。结果表明，将吡嗪并喹喔啉基团引入MOFs可成为制备高效硝基炸药荧光传感材料的有效策略。
