General correlation between the chemical shift of hyperpolarized 129Xe and the pore size of mesoporous solids.
Résumé
We report the variation of 129Xe chemical shift d versus the pore size, the temperature and the xenon pressure of xenon adsorbed on mesoporous materials prepared in different synthesis conditions. The use of hyperpolarized xenon allows us to measure spectra at very low concentration of xenon, where d reflects mainly interaction between the adsorbed xenon atoms and the surface.We deduce the heat adsorption of xenon adsorbed on the surface of studied materials.