Porous materials bearing stepwise-controlled pore-shape change that are capable of executing sophisticated tasks are of considerable interest due to their fascinating features.In this work,we present a(3,4,6)-connecte...Porous materials bearing stepwise-controlled pore-shape change that are capable of executing sophisticated tasks are of considerable interest due to their fascinating features.In this work,we present a(3,4,6)-connected metal–organic framework built of 1D hinge-like zig–zag chain and tritopic ligand,formulated as(H_(3)O)_(2)[Zn_(3)(dmtrz)_(2)(tipa)_(2)]·4H_(2)O(MAC-20,Hdmtrz=3,5-dimethyl-1H-1,2,4-triazole,H_(3)tipa=5-(2Htetrazol-5-yl)isophthalic acid).By regulating the hinge angle and hydrogen bond interaction of 1D chain and tritopic ligand precisely,we realize a unique two-step pore-shape change in MAC-20 structure,which reveals that 1D chain and tritopic ligands have a synergistic effect on the structural transformation.Furthermore,the MAC-20 structure executes the sequential adsorption of indigo blue(ID)and sudan-I(SD-I)stepwise-controlled by trimethylamine and N,N-dimethylformamide,which offers the potential to exploit the flexible MOFs for smart multi-step stimuli-responsive applications.展开更多
基金financial support from the Natural Science Foundation of Shanghai(Grant 18ZR1402900)National Natural Science Foundation of China(No.21971045)+1 种基金National Key Technologies R&D Program of China(2017YFA0205103)Shanghai Leading Academic Discipline Project(B108).
文摘Porous materials bearing stepwise-controlled pore-shape change that are capable of executing sophisticated tasks are of considerable interest due to their fascinating features.In this work,we present a(3,4,6)-connected metal–organic framework built of 1D hinge-like zig–zag chain and tritopic ligand,formulated as(H_(3)O)_(2)[Zn_(3)(dmtrz)_(2)(tipa)_(2)]·4H_(2)O(MAC-20,Hdmtrz=3,5-dimethyl-1H-1,2,4-triazole,H_(3)tipa=5-(2Htetrazol-5-yl)isophthalic acid).By regulating the hinge angle and hydrogen bond interaction of 1D chain and tritopic ligand precisely,we realize a unique two-step pore-shape change in MAC-20 structure,which reveals that 1D chain and tritopic ligands have a synergistic effect on the structural transformation.Furthermore,the MAC-20 structure executes the sequential adsorption of indigo blue(ID)and sudan-I(SD-I)stepwise-controlled by trimethylamine and N,N-dimethylformamide,which offers the potential to exploit the flexible MOFs for smart multi-step stimuli-responsive applications.
