Zinc Based Metal Organic Frameworks: Synthesis, Characterization and Heterogeneous Catalytic Study for Greener Oxidation of Alcohols

Abstract

In this contribution, we report here the synthesis, detailed characterization and catalytic performance of robust and porous metal organic frameworks(MOFs) based on Zinc (II) metal ion, di , tri carboxylic aromatic ligands and mixture of di and bipyridyl ligands namely Zn-BTC, Zn-BDC, Zn(BDC)(Bipy) MOFs, where BDC -1,4 benzene dicarboxylic acid. BTC - 1,3,5 benzene tricarboxylic acid, Bipy- 4,4’ bipyridine. The condition of preparation and activation process have been investigated. The individual materials obtained were characterized by powder x-ray diffraction (P-XRD), infrared (IR) spectroscopy, thermogravimetric analysis(TGA), BET surface area and pore volume and scanning electron microscopy (SEM). All the three Zn-based MOFs showed excellent catalytic performance for oxidation of alcohols which was confirmed by GC-MS. Whenever possible, comparison is made between the synthesized materials in order to contour probabilities which ligand might be superior in MOFs for catalytic performances. This work provides a quantitative understanding that Zn-based MOFs are an efficient catalyst for oxidation reactions and the catalysts could be recycled and reused three times without losing its catalytic activity and without any structural modification.