Synthesis of novel of Mn(II), Co(II), and Cu(II) Schiff base complexes and their high catalytic effect on bleaching performance with H2O2

The bleaching effect of office bleaching agents containing S-PRG filler evaluated by pH value and electron spin resonance

“…Thus, the bleaching e cacy is not only governed by the pH value but also by an array of factors, such as viscosity, type of catalyst, and the product formulation [32]. Bleaching is generally recognized as an oxidation process [34] in which an oxidant such as H 2 O 2 is decomposed into active though unstable oxygen radicals, which exert their whitening effect by breaking double bonds in the conjugated system of chromophores and oxidizing other chemical moieties [35,36]. Several factors directly in uence the decomposition rate, such as incident light, pH, temperature, and interactions with transition metals [4,37].…”

“…Several transition metal ions, namely manganese (Mn), cobalt (Co), iron (Fe), and copper (Cu), have been evaluated for their catalytic effect on the H 2 O 2 bleaching mechanism. The use of Mn, Co, and Fe-based oxidation catalysts improved the oxidation process of H 2 O 2 [34]. Indeed, Mn is stated as the most effective catalyst for H 2 O 2 decomposition [15].…”

Synthesis, Spectroscopic and Thermal Characterization and Antioxidant Activities of Three Schiff Bases Derived from Aminophenol

“…Schiff bases discovered by Hugo Schiff in 1864 [1], have demonstrated that their structure contains the azomethine group -C=N-. Schiff bases, generally belongs to a very important class of organic compounds with wide range of a potential application, especially in hydrogenation and addition reactions as oxidation catalysts [2][3][4][5][6] and in anti-COVID-19 drug, anticancer drugs and electrochemistry as antibacterial and antiviral agents [7][8][9][10][11][12]. Schiff bases are comprising of few important ligands that coordinate with metal ions through azomethine nitrogen to form the complexes [13,14].…”