Synthèse, caractérisation, etude structurale par diffraction des rayons X et réactivité thermique des carboxylates à base d’alcalino-terreux.

Abstract

The main purpose of this thesis is based on the synthesis and characterization of new coordination compounds based on alkaline-earth metals. Two synthesis methods were used to prepare these materials: synthesis by way of chemistry in solution and by solvothermal route. The structural study and physico-chemical characterization of these compounds was achieved by several techniques such as: spctroscopie IR, UV spectroscopy, X-ray fluorescence, crystal structures of materials hybrids have been solved by X-ray single crystal and thermal behaviors were studied by thermogravimetry, has fully describe the mechanisms of the decomposition of the solid. Likewise, the influence of the bond strength within the hydrogen-bonding network on both the structure stability has been evidenced within these architectures. Initially, the synthesis and the structural characterization by X-ray diffraction as well as the study of the physico-chemical and photophysical properties and the thermal stability by the use of cinnamic acid associated with the Co-ligand 1, 10’-phenthroline led to the production of four coordination polymers. In a second step, we describe the preparation of a dicarboxylate ligand on imidazolium H(S,S-diLeuIm) and the synthesis of three complexes by aqueous solution method based on K, Sr, Ba and characterized by methods IR, RMN spectroscopy and EM-MS mass.