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Etude de la partie liquide d'une phase organogel (et de quelques autres systèmes) au moyen des paramètres dynamiques de la RMN (relaxation de spin, diffusion translationnelle)

Abstract : This thesis deals with NMR dynamical parameters, the latter leading to the two types of molecular motion: reorientation, obtained via relaxation parameters, and translation motion, directly probed by self-diffusion coefficient. First, spin relaxation concepts are introduced theoretically. Then, various dynamical parameters (relaxation times, Nuclear Overhauser Effet parameters, self-diffusion coefficients) are envisioned for studying three different systems. The interpretation of experimental results provides a variety of information that does not only concern the dynamics of molecules but also their structure, such as interatomic distances, or their organization in supramolecular systems. Structural and dynamic characterization of an organogel is the lead of this thesis. Indeed, each of the three following chapters is dedicated to a given NMR technique which is applied, among other things, to this system in order to study: i) the correlation between the gelator structure and its gel formation ability, ii) the role played by the solvent in the gelification process. Two other applications are considered: in the third chapter, devoted to cross-relaxation, we discriminate the Z or E configurations of a synthetic intermediate. In the fourth chapter, devoted to translational diffusion, we propose a very simple method for analyzing a mixture of three terpenes from NMR carbon-13 experiments
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Mehdi Yemloul. Etude de la partie liquide d'une phase organogel (et de quelques autres systèmes) au moyen des paramètres dynamiques de la RMN (relaxation de spin, diffusion translationnelle). Autre. Université Henri Poincaré - Nancy 1, 2011. Français. ⟨NNT : 2011NAN10122⟩. ⟨tel-01746281⟩

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