【摘 要】
:
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】
:
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,School of Chemistry,Sun Yat-Sen Universit
论文部分内容阅读
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.
其他文献
Herein,we report a highly chemo-and regioselective vicinal trifunctionalization of aryl iodides by palladium/norbornene (Pd/NBE)catalysis.The key feature of this new method is the introduction of two distinct nitrogen and carbon electrophiles,with a large
Using in situ atomic force microscopy,we visualized the oxidation dynamic process of toroidal lithium peroxide (Li2O2) in a working Li-O2 battery and clarified the correlation between the decomposition behavior and the charging rate.It was found that at a
Recently,the asymmetric nonfullerene acceptors (NFAs) with acceptor-donor-acceptor (A-D-A) structure have been developed rapid-ly,especially for the modification of asymmetric core,asymmetric side chains and asymmetric end groups.In this work,a novel asym
We describe a practical and general protocol for immobilization of heterogeneous catalysts to mechanically robust porous ultra-high molecular weight polyethylene tablets using inter-facial Lifshitz-van der Waals Interactions.Diverse types of powderous cat
A convenient palladium-catalyzed domino cyclization reaction for the construction of bis(benzofuranyl)methane scaffolds bearing an all-carbon quaternary center has been described.In the cascade process,one C(sp2)—O bond,two C(sp2)—C(sp3) bonds as well as
Perovskites (Ba0.5Sr0.5)1-xCo0.8Fe0.2O3-δ (x =0.02,0.05,0.1 denoted as BSCF-0.98,BSCF-0.95,BSCF-0.9,respectively) with A-site cation defects are synthesized by sirnple and efficient sol-gel method and are proved to have better OER catalytic effect than th
Amicetin and congeners constitute a small family of complex pyrimidine nucleosides,which exhibit strong antibiotic activities against Gram-positive bacteria and notably against strains of Mycobacterium tuberculosis.Herein,we report chemical synthesis of a
In this paper,two novel donor-acceptor (D-A) macrocyclic compounds 5 and 7 were successfully synthesized by post-functionalization of a planar dimer macrocycle (1) and a highly twisted trimer macrocycle (2),respectively,via controllable oxidation of metho
The efficient cleavage of carbon-oxygen (C-O) bond is highly important for the transformation of oxygen-rich biomass and industry chemicals.Herein,an efficient[3+3]annulation of β-ketoethers with cyclopropenones in the presence of catalytic base has been
Polymer-supramolecular double-network hydrogels (PS-DN hydrogels) often show much improved recovery rates than conventional double-network hydrogels because of the fast self-assembling properties,making them attractive candidates for tissue engineering an