Facile Fabrication of an AIE-Active Metal–Organic Framework for Sensitive Detection of Explosives in Liquid and Solid Phases

作者：Zhen‐Jiang Qiu, Shu-Ting Fan, Chengyuan Xing, Mengmeng Song, Zi‐Jun Nie, Long Xu, Shao‐Xia Zhang, Shao‐Xia Zhang, Lu Wang, Sheng Zhang, Sheng Zhang, Bang‐Jing Li · 发表于：ACS Applied Materials & Interfaces · 年份：2020 · DOI：10.1021/acsami.0c17165 · 被引用次数：76 · 研究领域：Luminescence and Fluorescent Materials、Metal-Organic Frameworks: Synthesis and Applications、Molecular Sensors and Ion Detection

Nowadays, the practical applications of metal–organic framework (MOF)-based fluorescence detectors are severely hindered because of the complex synthesis process of linkers or heavy metal contamination. The development of a simple, inexpensive, and environmentally friendly fluorescence sensing system remains a huge challenge. In this study, we designed and synthesized a TPE@γ-CD-MOF-K complex using the facile in situ encapsulation method. The unique pore structure of γ-CD-MOF allowed it to effectively include TPE and explosives as guests simultaneously. The TPE@γ-CD-MOF-K showed stronger fluorescence emission than TPE and sensitive fluorescence quenching activities in response to nitro-aromatic compounds in the liquid phase with detection limits as low as 3 ppm. Furthermore, TPE@γ-CD-MOF-K can also effectively detect nitro-aromatic compounds in the solid state, which is very convenient for practical detection of explosives. The unique pore structure of γ-CD-MOF-K and the interaction between K + and nitro compounds play important roles in solid-state quenching.