Ultrasound assisted synthesis of a Zn(II) metal-organic framework with nano-plate morphology using non-linear dicarboxylate and linear N-donor ligands

A 3D, porous Zn(II)-based metal-organic framework {[Zn-2(oba)(2)(4-bpdb)]center dot 2DMF}(n) (TMU-4) with double interpenetration was prepared by using a non-linear dicarboxylate (H(2)oba = 4,4'-oxybisbenzoic acid) and a linear N-donor (4-bpdb = 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene) ligand. Also micro-and nano-plates of this MOF were synthesized by a sonochemical process and characterized by scanning electron microscopy, X-ray powder diffraction and IR spectroscopy. The thermal stability was studied by thermogravimetric analysis (TGA). Sonication time and concentration of initial reagents effects on the size and morphology of nano-structured MOFs, were studied. Calcination of TMU-4 at 500 degrees C under air atmosphere yields ZnO nanoparticles.