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All Journal Indonesian Journal of Science and Technology
Rafika El Ati
University Mohammed Premier
Computer Science & IT Environmental Science

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Study of the Catecholase Activity of new catalysts Based on Copper (II) and Heterocyclic Ligands Rafika El Ati; Haytham Bouammali; Mohamed El Kodadi; El Bekkay Yousfi; Rachid Touzani; Belkheir Hammouti
Indonesian Journal of Science and Technology Vol 7, No 1 (2022): IJOST: VOLUME 7, ISSUE 1, April 2022
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v7i1.41605

Abstract

In this work, we are interested in finding new catalysts for catecholase, whose principle is based on the oxidation reaction of catechol to o-quinone. We approached the synthesis of the threes tripod ligands based on pyrazole in a condensation reaction and its characterization by IR, 13C NMR, 1H NMR spectroscopy, then we evaluated the catalytic properties of certain complexes formed in situ to catalyze the oxidation reaction of catechols to o-quinones. The aim is to find the right models to reproduce the catalytic activity of the enzyme (catecholase), we used complexes formed in situ by pyrazole derivatives with Copper salts. Among these complexes, the complex L4/Cu(CH3COO)2 showed good catalytic activity of the combination (1ligand/2metal) in MeOH for this reaction, with a speed Vmax equal to 69.38 μmol.L-1.min-1 and a low value of Km equal to 0.019 mol.L-1. We have demonstrated that the nature of concentration, ligand, solvent, and copper salts, influenced strongly the catecholase activity.
Co-Authors Belkheir Hammouti El Bekkay Yousfi Haytham Bouammali Mohamed El Kodadi Rachid Touzani