Shi Yadong, Ding Yanglan, Tao Wei, Wei Peifa
Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui Graphene Engineering Laboratory, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China.
ACS Appl Mater Interfaces. 2022 Aug 10;14(31):36071-36078. doi: 10.1021/acsami.2c11800. Epub 2022 Jul 29.
The inherent weak bonding nature of hydrogen-bonded organic frameworks (HOFs) performs like a double-edged sword in that it endows HOFs with superiority in processability and dynamicity but deactivates its on-demand controllability in the crystalline phase. Herein, based on the synergy of dynamic H-bonding interactions and the tailored low solubility in common organic solvents, reversible and fast topological transitions between cage- and channel-type HOFs were achieved upon immersing in the solution state. The aggregation-induced-emission character of the tecton facilitates the visualization of the elusive initial transition process with high sensitivity. In addition, the visible transition from cage- and channel-type HOFs to thermally stable crystalline phases is also achieved under thermal induction.
氢键有机框架（HOFs）固有的弱键合性质就像一把双刃剑，它赋予HOFs在可加工性和动态性方面的优势，但却使其在晶相中的按需可控性失效。在此，基于动态氢键相互作用和在常见有机溶剂中定制的低溶解度的协同作用，通过浸入溶液状态实现了笼型和通道型HOFs之间可逆且快速的拓扑转变。构筑单元的聚集诱导发光特性有助于以高灵敏度可视化难以捉摸的初始转变过程。此外，在热诱导下也实现了从笼型和通道型HOFs到热稳定晶相的可见转变。
