Bimetallic Cu–Zn Zeolitic Imidazolate Frameworks as Peroxidase Mimics for the Detection of Hydrogen Peroxide: Electrochemical and Spectrophotometric Evaluation

Abstract

A copper incorporated zeolitic imidazolate framework-8 (ZIF-8) has been synthesized and demonstrated to be a potential material for a peroxidase mimic. The resultant bimetallic Cu−Zn incorporated MOF is used for the dual mode sensing of hydrogen peroxide by following electrochemical as well as spectrophotometric methods. Using 3,3′,5,5′-tetramethylbenzidine (TMB) as a chromogenic substrate, spectrophotometric studies are carried out, and the steady state kinetic parameters are determined for two different concentrations of Cu incorporated ZIF-8

Synthesis, characterization and adsorption optimization of bimetallic La–Zn metal organic framework for removal of 2,4-dichlorophenylacetic acid

“…Remarkably, the La–N/Zn–N stretching vibration band at 435 cm −1 was seen, indicating how the methylimidazole groups' nitrogen atoms combine chemically with La and Zn ions to generate imidazolate. Additionally, in the case of La/Zn-MOF, the peak at 1843 cm −1 of the N–H stretching frequency resulting from 2-methyl imidazole is absent, indicating the bonding that exists between the ligand and metal center [ 49 ].

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