Andriichuk Y. Complexes of transition metals with thiosemicarbazones of aromatic aldehydes and 4-aminobenzenesulfamide as inhibitors of free radical processes

For the first time, a systematic study of antioxidant organs of complex compounds of d-elements with thiosemicarbazones of aromatic aldehydes and 4-aminobenzenesulfamide was carried out in the processes of decomposition of cumene hydroperoxide and initiative oxidation of cumene. The dissertation is devoted to the study of the influence of transition metal complexes with thiosemicarbazones of aromatic aldehydes and 4-aminobenzenesulfamide on free radical reactions of cumene hydroperoxide decomposition and cumene oxidation. It is proposed to use the process of decomposition of cumene hydroperoxide in dimethylformamide to study the inhibitory properties of thiosemicarbazones of aromatic aldehydes and 4-aminobenzenesulfamide and complex compounds of d-elements based on them. Thiosemicarbazones of aromatic aldehydes and 4-aminobenzenesulfamide were found to slow down the induced decomposition of cumene hydroperoxide due to the formation of more stable intermediate free radicals. Electron-donating substituents in the benzene nucleus enhance their inhibitory properties. Antioxidant properties of complex compounds of d-elements in the process of decomposition of cumene hydroperoxide depend on the nature of the ligand and the central ion, in particular its electronic configuration. At low concentrations, the decomposition is slowed down by breaking the chains with ligands, and at high concentrations, the acceleration of decomposition under the influence of the central ion is observed. It was found that in the process of decomposition of cumene hydroperoxide, copper complexes based on thiosemicarbazones of aromatic aldehydes and 4-aminobenzenesulfamide do not have inhibitory properties, but on the contrary, catalyze this process. The technology of synthesis of CdSe nanoparticles and CdSe / ZnS nanostructures of core-shell type using cadmium complex with 4-amino-benzenesulfamide has been developed, which eliminates the need to create an inert atmosphere, as the complex is an effective oxidation inhibitor.