Speaker
Dr
Vahid Safarifard
(Iran University of Science and Technology)
Description
Here we report the use of a pillaring strategy for the design and synthesis of two novel amide-functionalized isoreticular metal-organic frameworks (MOFs), [Zn2(oba)2(bpta)]·(DMF)3 (TMU-22) and [Zn2(oba)2(bpfb)]·(DMF)5 (TMU-23), where H2oba = 4,4´-oxybisbenzoic acid, bpta = N,N´-bis(4-pyridinyl)terephthalamide, bpfb = N,N´-bis-(4-pyridylformamide)-1,4-benzenediamine and DMF is N,Ndimethylformamide. Solvothermal reactions between Zn(NO3)2·6H2O, H2oba, and the corresponding pillar ligand in DMF at 120 °C for 3 days produced prismatic crystals of TMUs-22/-23 suitable for single-crystal X-ray diffraction analyses. Crystallographic data for TMU-22 and TMU-23 were collected at 100 K at XALOC beamline at ALBA synchrotron (λ = 0.79474 and 0.82653 Å, respectively). TMU-22 and TMU-23 crystallize in the monoclinic P21/n and P21/c space groups, respectively. They are neutral threefold interpenetrated MOFs formed by {Zn(oba)} layers connected through the N,N´-pillar ligands. Their basic unit is a dinuclear zinc cluster, in which both Zn(II) centers are penta-coordinated to four carboxylate O atoms from three fully deprotonated oba ligands and to one N atom from the N,N´-donor ligand.
