Yang Xiaoxin, Zhang Qiao, Liu Yufeng, Nian Mengjie, Xie Min, Xie Shasha, Yang Qinglian, Wang Suna, Wei Hui, Duan Jingui, Dong Shengyi, Xing Hang
Institute of Chemical Biology and Nanomedicine, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
College of Engineering and Applied Sciences, State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing, Jiangsu, 210023, China.
Angew Chem Int Ed Engl. 2023 Aug 21;62(34):e202303280. doi: 10.1002/anie.202303280. Epub 2023 May 9.
Dispersing metal-organic framework (MOF) solids in stable colloids is crucial for their availability and processibility. Herein, we report a crown ether surface coordination approach for functionalizing the surface-exposed metal sites of MOF particles with amphiphilic carboxylated crown ether (CE ). The surface-bound crown ethers significantly improve MOF solvation without compromising the accessible voids. We demonstrate that CE -coated MOFs exhibit exceptional colloidal dispersibility and stability in 11 distinct solvents and six polymer matrices with a wide range of polarities. The MOF-CE can be instantaneously suspended in immiscible two-phase solvents as an effective phase-transfer catalyst and can form various uniform membranes with enhanced adsorption and separation performance, which highlights the effectiveness of crown ether coating.
将金属有机框架（MOF）固体分散在稳定的胶体中对于其可用性和可加工性至关重要。在此，我们报告了一种冠醚表面配位方法，用于用两亲性羧化冠醚（CE）对MOF颗粒表面暴露的金属位点进行功能化。表面结合的冠醚在不影响可及孔隙的情况下显著改善了MOF的溶剂化作用。我们证明，CE包覆的MOF在11种不同的溶剂和6种具有广泛极性的聚合物基质中表现出优异的胶体分散性和稳定性。MOF-CE可以作为有效的相转移催化剂瞬间悬浮在不混溶的两相溶剂中，并且可以形成具有增强吸附和分离性能的各种均匀膜，这突出了冠醚包覆的有效性。
