Réactivité et structure d’azo-substances aromatiques chromogènes

Abstract

The first objective of this work is devoted to the study of strategies for the synthesis of azo-compounds and their derivatives, among other things, highlighting "the properties of azo dyes" known for their importance and usefulness in Sanitaryagro-industrial areas. The content of this thesis is based on a modest contribution to the study of a certain class of azo-compounds bearing the chromophore -N = N- is subdivided as follows: - The first part is a presentation of the main dyes and the classical reactions that characterize them. - The second part deals with the synthesis of a series of azo compounds. With the identification of the major groups of these compounds by NMR1H, NMR13C and infra red thus a structural study on some dyes obtained. - In the third part, we will describe the synthesis pathway which led us to obtain Tris (E) -1- (o-tolyldiazenyl) naphthalen-2-ol} cobalt (III) [(C17H13N2O)3Co].C4H8O] An analytical study and structural analysis of the complex obtained. - The fourth part is devoted to the solvatochromic study of a series of prepared and purified structures illustrated by the corresponding curves highlighting the quantitative variations of the various coexisting tautomeric forms in relation to the polarity of the solvent. - Finally, a general conclusion summarizes the main results obtained through the study of different experimental and characteristic parameters of some azo dyestuffs.