Résumé
Several organosilylated molecular precursors with hydrolysable alkoxy groups have been designed to prepare insoluble solid hybrid organosilicates, commonly known as silsesquioxanes. These solid hybrids are potentially efficient for the solid phase extraction of actinides. The chelating properties of the main organic fragments are exploited to uptake the metallic species from acidic aqueous hlgh level liquid waste (HLLW).