Tetrazole Based Porous Metal Organic Framework (MOF): Topological Analysis and Dye Adsorption Properties

A tetrazole based metal organic framework [Cu(Metet)] n (MOF-1) (MetetH = 5-methyl-1H-tetrazole) has been prepared under solvothermal condition using sodium azide and nitrile in presence of CuCl 2 ·2H 2 O. The crystalline product thus obtained was characterized by spectral (FTIR, UV–visible and fluorescence) and single crystal X-ray diffraction analysis. Tetrazole ligand is formed in situ by the reaction of azide and nitrile used. X-ray data confirm the tetrahedral geometry around the Cu(II) ion where all the four coordination sites are provided by four N of the four different ligand (Metet). MOF-1 has trigonal crystal system with R-3 m space group. Topological analysis of MOF-1 shows 4,4-c binodal net with uncommon ptr topology and stoichiometry, (4-c)(4-c). The detailed structural analysis reveals the porous nature of the MOF with channel of dimensions, R f = 0.6 Å and R fi = 2 Å. Further, the present MOF shows excellent adsorption properties towards organic dye, Methylene blue (MB) and thus can be employed as a good adsorbent for organic pollutants to remove MB from waste water. The possible rationale behind the dye adsorption is the porous nature of the MOF-1. Graphic Abstract