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