Two Low-Dimensional MOFs: Promising Sensors for Selective and Sensitive Detection of Nitroaromatic Compounds in Aqueous and Vapor Phases

and a limit of detection (LOD) of 0.63 μM. Moreover, it exhibits a rapid response (<10 s) toward ppb-level 4-NA vapor. Through comprehensive experimental analysis verified by DFT calculations, we have demonstrated that the fluorescence detection mechanism involves a synergistic effect combining competitive absorption with photoinduced electron transfer. Furthermore, test paper fabricated through simple loading procedures has shown significant potential for practical applications across various scenarios. This work provides novel research insights and practical approaches for MOF-based NACs detection technologies.