College of Polymer Science and Engineering, Qingdao University of Science and Technology, Zhengzhou Road, 266000, Qingdao, China.
Angew Chem Int Ed Engl. 2023 Mar 20;62(13):e202217903. doi: 10.1002/anie.202217903. Epub 2023 Feb 15.
A weak CH/O hydrogen-bonded organic framework (HOF) with both rigidity and flexibility that could easily and reversibly switch from a non-crystalline to a crystalline phase was constructed. The specific solvent molecule acts as a "key" to control the crystallinity, while the highly rigid triangle macrocycle as the building block is the "lock". The introduction and removal of the "key" could influence the local flexibility of the whole framework and lead to switchable crystallinity. Furthermore, the obtained HOF exhibits excellent separation efficiency for benzene and cyclohexane (94.4 %).
一种具有刚性和柔性的弱 CH/O 氢键有机骨架（HOF），可以很容易地和可逆地从非晶相转变为晶相。特定的溶剂分子充当“钥匙”来控制结晶度，而作为构筑块的高刚性三角大环是“锁”。“钥匙”的引入和去除会影响整个骨架的局部柔性，从而导致结晶度的可切换。此外，所得到的 HOF 对苯和环己烷（94.4%）具有优异的分离效率。
