The sensitive detection of explosives is urgently required for human security and social stability. Luminescent metal–organic frameworks (MOFs) are attractive but it is challenging to develop versatile all-in-one MOF-based sensors. In this work, we report a novel 3-fold interpenetrating structure Zn(II)-based MOF (ZnMOF-1) for detecting 1,1-diamino-2,2-dinitroethylene (FOX-7)-like emerging energetic compounds. Featuring 2,7-di(pyridin-4-yl)-9H-fluoren-9-one as a donor–acceptor structure ligand, our crystalline ZnMOF-1 achieves a limit of detection of FOX-7-like compounds as low as 0.14 ppm, with a highest fluorescence quenching constant of 3.22 × 10⁴ M⁻¹. The detection mechanism occurring via strong host–guest interactions was found to be intensified due to the hydrogen bonds formed between the MOF and the explosives. Our study is instructive for the design of highly sensitive luminescent MOF sensors for emerging polar donor–acceptor structure explosives.

中文翻译：

---

供体-受体配体金属-有机骨架展示了氢键增强的 N-杂环炸药传感

爆炸物的灵敏检测是人类安全和社会稳定的迫切需要。发光金属有机框架 (MOF) 很有吸引力，但开发基于 MOF 的多功能一体式传感器具有挑战性。在这项工作中，我们报告了一种新型的 3 重互穿结构 Zn( II ) 基 MOF (ZnMOF-1)，用于检测 1,1-二氨基-2,2-二硝基乙烯 (FOX-7) 样新兴高能化合物。我们的结晶 ZnMOF-1以 2,7-di(pyridin-4-yl)-9 H -fluoren-9-one 作为供体-受体结构配体，实现了对 FOX-7 类化合物的检测限低至0.14 ppm，最高荧光猝灭常数为3.22 × 10 ⁴ M ^-1。检测机制通过由于 MOF 和炸药之间形成的氢键，强烈的主客体相互作用被发现。我们的研究对于设计用于新兴极性供体-受体结构炸药的高灵敏度发光 MOF 传感器具有指导意义。