Three new metal-organic frameworks constructed from triazol-phenyl polycarboxyl acid: Synthesis, crystal structures and properties

Three new metal-organic frameworks (MOFs), formulated as [Cd(tia)(H2O)(2)](n) (1), [Cu(tia)(H2O)(2)](n) (2) and {[Zn-3(ctia)(2)center dot(H2O)(8)]center dot 2H(2)O}(n) (3) (tia(2-) = 5-(1H-1,2,3-triazol-1-yl) isophthalate, ctia(3-) = 5-(4-carboxylato-1H-1,2,3-triazol-1-yl) isophthalate) have been synthesized under hydrothermal conditions and characterized. Single-crystal X-ray diffraction analysis reveals that complexes 1 and 2 show similar common 2D (6, 3) topology network layers and these layers are further connected by H-bonding interactions to form 3D supermolecular structures. Complex 3 displays a unique 1D ladder-like chain structure, in which parallel arrangements of Zn1 coordination chains are linked by SBUs (SBUs: Secondary Building Units) containing the Zn2 center. Magnetic measurements in the range 2-300 K have shown antiferromagnetic interactions among the adjacent copper ions in complex 2. Complexes 1 and 3 exhibit strong luminescent emissions in the solid state at room temperature. (c) 2012 Elsevier Ltd. All rights reserved.