A zinc(II) sulfate-based porous framework with new topology and its usage as catalyst in Friedel–Crafts alkylation reaction.

A novel zinc(II) porous 3D framework with a new 4,6-connected binodal topology constructed by 4,4′-bipyridine and sulfate anion has been successfully isolated, and its usage as catalyst in Friedel–Crafts alkylation reaction has been reported. • An unprecedented 3D Zn(II)-MOF showing a new 4,6-connected topology is repoorted. • A new Cu(II)-MOF activated by PSE can be used as catalyst for Friedel–Crafts reaction. • This work enriches the field of MOFs constructed by inorganic sulfate anions. An unprecedented three-dimensional supramolecular MOF, namely [Zn 3 (bpy) 3 (SO 4) 4 ]·(Me 2 NH 2) 2 ·DMF·9H 2 O (1 , where bpy = 4,4′-bipyridine, DMF = N,N′-dimethylformamide), has been efficaciously synthesized under the solvothermal reaction. A single-crystal structure determination showed that the wavelike [Zn 3 (bpy)(SO4) 4 ] layers are pillared by pairs of bpy ligands to give a new 4,6-connected binodal self-penetrated network with overall (4264)(42687382) topology. 1 also has been fully identified characterized by thermogravimetric analysis, gas adsorption properties and so on. In addition, a new Cu(II)-MOF (cat1) was further prepared by postsynthetic exchange (PSE) synthetic approach based on compound 1 , which is proved to be an active catalyst for the Friedel–Crafts reaction of indole with β -nitrostyrenes. The result from this work provides a new attempt to describe the crystallization of inorganic sulfate anion link to the organic functional group, and the functionalization-induced MOF gain insights for designing new functional MOF. [ABSTRACT FROM AUTHOR]