【摘 要】
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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
【机 构】
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MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,School of Chemistry,Sun Yat-Sen Universit
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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 crys-tals,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,H2edba =4,4\'-(ethyne-1,2-diyl)dibenzoic acid,bpy =4,4\'-bipyri-dine).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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