期刊
CHINESE JOURNAL OF CHEMISTRY
卷 39, 期 10, 页码 2718-2724出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.202100263
关键词
Porous coordination polymers; Metal-organic frameworks; Structural transformation; X-ray diffraction; Adsorption
资金
- NSFC [22090061, 21731007, 21821003, 22001160]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01C161]
The study discusses the importance of magnifying the controllable directional motions of molecular machines to the macroscopic levels using metal-organic frameworks, and observes the dynamic structural inversion of a specific framework. This inversion, selectively guest-controllable and independent in pillars and layers, enables precise control of directional shape changes.
Main observation and conclusion Magnifying the controllable directional motions of molecular machines to the macroscopic levels is a significant topic for chemists. Flexible metal-organic frameworks with long-range order and responsive structural transformation under external stimuli may be an appropriate platform for achieving the target. By taking advantage of the single-crystal to single-crystal manner of soft porous crystals, we utilize single-crystal X-ray diffraction to directly observe the dynamic structural inversion of a new three-fold interpenetrated pillared-layer metal-organic framework [Co(edba)(bpy)] (MCF-83, H(2)edba = 4,4'-(ethyne-1,2-diyl)dibenzoic acid, bpy = 4,4'-bipyridine). More interestingly, the dynamic inversions of the pillars and layers are selectively guest-controllable and independent, allowing precise control of the directional shape changes, which is the key of constructing intelligent materials to accomplish a complex task. The mechanism is further studied by combining the X-ray diffraction analyses, sorption measurements and molecular simulations.
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