Mixed‐Ligand Metal‐Organic Frameworks: Synthesis and Characterization of New MOFs Containing Pyridine‐2,6‐dimethanolate and Benzene‐1,4‐dicarboxylate Ligands

Abstract

The development of synthetic approaches towards new mixed‐ligand metal organic frameworks (MOFs) has been attracting considerable attention recently as they display fascinating properties due to the synergistic effect between the different ligands. Herein, the initial combination of pyridine‐2,6‐dimethanol (H2pdm) with benzene‐1,4‐dicarboxylic acid (H2bdc) has provided access to three new mixed‐ligand MOFs, [M3(bdc)2(Hpdm)2]n (MII=ZnII, 1; MnII, 2) and [Mn3(bdc)3(H2pdm)2]n (3). 1–3 are the first MOFs containing H2pdm in its neutral or anionic form. 1 and 2 are isostructural 2D MOFs with a square lattice (sql) framework topology, while 3 is a 3D MOF possessing a primitive cubic (pcu) topology. Dc magnetic susceptibility measurements for 3 demonstrate antiferromagnetic interactions between the MnII ions which is a combination of intra‐ and intertrimer exchange pathways.

Synthesis and characterisation of new coordination polymers by combining 2-pyridyl oximes or alcohols with functionalised terephthalic acid analogues

“…Preliminary results indicate that new CPs or MOFs can be synthesized using ligands such as pyridine-2-amidoxime, 2-methyl pyridyl ketoxime, 2-pyridinemethanol, and pyridine-2,6-dimethanol. 34–37 Some of the isolated MOFs have novel framework topology and demonstrate good performance in metal ion encapsulation. 34…”

“…Preliminary results indicate that new CPs or MOFs can be synthesized using ligands such as pyridine-2-amidoxime, 2-methyl pyridyl ketoxime, 2-pyridinemethanol, and pyridine-2,6-dimethanol. [34][35][36][37] Some of the isolated MOFs have novel framework topology and demonstrate good performance in metal ion encapsulation. 34 With the above in mind, we wished to investigate further this approach for the synthesis of mixed-ligand CPs and MOFs, and in particular we were prompted to employ organic linkers with additional functional groups beyond carboxylates.…”