Premium
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
Author(s) -
Liang Feng-Lan,
Ma De-Yun,
Qin Liang
Publication year - 2016
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s205322961600437x
Subject(s) - supramolecular chemistry , metal organic framework , luminescence , ligand (biochemistry) , benzoic acid , crystallography , bipyridine , topology (electrical circuits) , materials science , thermal stability , chemistry , crystal structure , organic chemistry , mathematics , biochemistry , receptor , optoelectronics , adsorption , combinatorics
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[[(μ 2 ‐3,3′‐dimethyl‐4,4′‐bipyridine‐κ 2 N : N ′)bis(μ 4 ‐4,4′‐oxydibenzoato‐κ 4 O : O ′: O ′′: O ′′′)dizinc] tetrahydrate], {[Zn 2 (C 14 H 8 O 5 ) 2 (C 12 H 12 N 2 )]·4H 2 O} n , has been prepared by the solvothermal assembly of Zn(NO 3 ) 2 ·6H 2 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. ZnO 4 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 [Zn 2 (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.