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[Angew. Chem. Int. Ed.] Intramolecular Cation-π Interactions Organize Bowl-Shaped, Luminescent Molecular Containers
作者:Jia He, Minggui Bai, Xuedong Xiao, Shuai Qiu, Wenzhuo Chen, Jiaqi Li, Yang Yu,* and Wei Tian*
關鍵字:Bowl-shaped molecular containers, cation-π, selective binding affinity, room-temperature phosphorescence
論文來源:期刊
具體來源:Angew. Chem. Int. Ed. 2024, e202402697
發表時間:2024年

Molecules with nonplanar architectures are highly desirable due to their unique topological structures and functions. We report here the synthesis of two molecular containers (1·3Br- and 1·3Cl-), which utilize intramolecular cation-π interactions to enforce macrocylic arrangements and exhibit high binding affinity and luminescent properties. Remarkably, the geometry of the cation-π interaction can be flexibly tailored to achieve a precise ring arrangement, irrespective of the angle of the noncovalent bonds. Additionally, the C-H·Br- hydrogen bonds within the container are also conducive to stabilizing the bowl-shaped conformation. These bowl-shaped conformations were confirmed both in solution through NMR spectroscopy and in the solid state by X-ray studies. 1·3Br- shows high binding affinity and selectivity: F->Cl-, through C-H···X-(X=F, Cl) hydrogen bonds. Additionally, these containers exhibited blue fluorescence in solution and yellow room-temperature phosphorescence (RTP) in the solid state. Our findings illustrate the utility of cation-π interactions in designing functional molecules.


全文鏈接: https://doi.org/10.1002/anie.202402697.


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