A hydrostable and twofold interpenetrating three‐dimensional zinc–organic framework with rob topology based on 4, 4′‐oxydibenzoate and 3, 3′‐dimethyl‐4, 4′‐bipyridine ligands. Issue 5 (5th April 2016)

• Record Type: Journal Article
• Authors: Liang, Feng-Lan; Ma, De-Yun; Qin, Liang
• Is Part Of: Acta crystallographica. Volume 72:Issue 5(2016)
• Page Start: 373
• Page End: 378
• Publication Date: 2016-04-05
• Subjects: zinc–organic framework -- three‐dimensional coordination polymer -- hydrostable -- twofold interpenetration -- rob topology -- luminescence -- crystal structure -- IR analysis -- metal–organic framework -- MOF -- SQUEEZE; Crystallography -- Periodicals; Crystals -- Periodicals; 548.3
• DOI: 10.1107/S205322961600437X
• Languages: English
• ISSNs: 2053-2296

Abstract

Abstract : The solvothermal synthesis of a hydrostable and twofold three‐dimensional zinc‐based metal–organic framework (MOF) involving 4, 4′‐oxydibenzoate and 3, 3′‐dimethyl‐4, 4′‐bipyridine ligands, leads to a material that displays an intense blue luminescence. Abstract : Metal–organic frameworks (MOFs) are a new class of porous materials that have received widespread attention due to their potential applications in gas storage and/or separation, catalysis, luminescence, and so on. The title compound, poly[[(μ2 ‐3, 3′‐dimethyl‐4, 4′‐bipyridine‐κ 2 N : N ′)bis(μ4 ‐4, 4′‐oxydibenzoato‐κ 4 O : O ′: O ′′: O ′′′)dizinc] tetrahydrate], {[Zn2 (C14 H8 O5 )2 (C12 H12 N2 )]·4H2 O} n, has been prepared by the solvothermal assembly of Zn(NO3 )2 ·6H2 O, 4, 4′‐oxydi(benzoic acid) and 3, 3′‐dimethyl‐4, 4′‐bipyridine. The two Zn II atoms adopt the same five‐coordinated distorted square‐pyramidal geometry ( i.e. ZnO4 N), bonding to four O atoms from four different 4, 4′‐oxydibenzoate (oba) ligands and one N atom from a 3, 3′‐dimethyl‐4, 4′‐bipyridine (dmbpy) ligand. The supramolecular secondary building unit (SBU) is a paddle‐wheel [Zn2 (COO)4 ] unit and these units are linked by oba ligands within the layer to form a two‐dimensional net parallel to the b axis, with the dmbpy ligands pointing alternately up and down, which is further extended by dmbpy ligands to form a three‐dimensional framework with rob topology. The single net leaves voids that are filled by mutual interpenetration of an independent equivalent framework in a twofold interpenetrating architecture. The title compound shows thermal stability up to 673 K and is stable in aqueous solutions in the pH range 5–9. Excitation and luminescence data observed at room temperature show that it emits a bright‐blue fluorescence.