Synthesis and characterizations of a bis(triazole)-based 3D crystalline copper(II) MOF with high adsorption capacity for congo red dye

Hydrothermal synthesis has afforded a 3D copper(II) metal-organic framework (MOF) based on a new rigid bis(triazole)-based ligand, namely, {[Cu-3(btb)(3)(nbta)(2)]center dot(H2O)(2)}(n) (btb = 4,4'-bis(1,2,4-triazoly1-1-y1)-biphenyl, H(3)nbta = 5-nitro-1,2,3-benzenetricarboxylic acid), which has been characterized by IR, elemental analysis, thermal gravimetric and single-crystal X-ray diffraction. The structural analyses reveal that title complex displays a rarely 3D trinodal (3,4,4)-connected network with 3,4,4T20 topology. Further, fluorescence and excellent adsorption properties for congo red dye of the compound have been investigated. (C) 2015 Elsevier B.V. All rights reserved.