Investigation of The Effects of Diaminopyridine and o-Vanillin Derivative Schiff Base Complexes of Mn(II), Mn(III), Co(II) and Zn(II) Metals on The Oxidative Bleaching Performance of H2O2

Abstract

Catalytic applications are widely used in both industrial and individual applications today due to their many advantages, especially the energy and time they provide. For this purpose, many coordination compounds have been synthesized and their catalytic performances have been investigated in recent years. In this study, the Schiff base ligand, (N,N’-bis(2-hydroxy-3-methoxyphenylmethylidene)-2,6-pyridinediamine, BHMP), was synthesized with 2,6-diaminopyridine with o-vanillin. Mn(II), Mn(III), Co(II), Zn(II) complexes were obtained with the synthesized ligand. Spectroscopic methods such as FT-IR, 1H-NMR, UV-vis, Mass, and melting point determination methods were used for the structure elucidation of the synthesized compounds. The performances of the obtained complexes as bleach catalysts, which is an important application area of Schiff base complexes, were investigated. According to the bleaching measurement results; the highest catalytic effect on the bleaching performance of H2O2 in pH 10.5 buffer at 25°C under homogeneous conditions was obtained with Co(II) complex, and it was understood that this complex was followed by Mn(II), Mn(III) and Zn(II) complexes, respectively