Pillar[5]arene‐Based Supramolecular Organic Framework with Multi‐Guest Detection and Recyclable Separation Properties

The selective detection and separation of target ions or molecules is an intriguing issue. Herein, a novel supramolecular organic framework (SOF‐THBP) was constructed by bis‐thioacetylhydrazine functionalized pillar[5]arenes. The SOF‐THBP shows a fluorescent response for Fe3+, Cr3+, Hg2+ and Cu2+ ions. The xerogel of SOF‐THBP shows excellent recyclable separation properties for these metal ions and the absorption rates were up to 99.29 %. More interestingly, by rationally introducing these metal ions into the SOF‐THBP, a series of metal‐ion‐coordinated SOFs (MSOFs) such as MSOF‐Fe, MSOF‐Hg and MSOF‐Cu were constructed. These metal ions coordinated MSOFs could selectively sense F−, Br−, and l‐Cys, respectively. The detection limits of these MSOFs for F−, Br− and l‐Cys were about 10−8 m. Multi‐Functional SOFs: A novel supramolecular organic framework (SOF‐THBP) was constructed by functionalized pillar[5]arenes. By rationally introducing metal ions into the SOF‐THBP, a series of metal‐ion‐coordinated SOFs (MSOFs) were constructed. The SOF‐THBP shows excellent recyclable separation properties for Cr3+, Hg2+, etc. The MSOFs could selectively and sensitively sense F−, Br−, and l‐Cys, respectively.