Synthesis of chemisorbed imidazolium and phosphonium cations by reaction of ionic liquid precursors with silica.

The reaction of four different basic ionic liquid precursors with Aerosil®300 is presented. Chemisorbed imidazolium and phosphonium cations, with silanolate anions as part of the silicatic support, were obtained and investigated with various solid state NMR techniques.