Vibrational spectroscopy, SFG

These surface-specific techniques provide information on the ionic liquid structure and composition at the surface. They probe the interfacial region at various technique-specific probing depths for analysis of surface concentration and structural identification. Vibrational spectroscopy, SFG in particular, is a widely used tool for orientational analysis of ionic Uquids at interfaces [1]. [Pg.147]

Direct orientation measurements of the methylene tail in amphiphilic monolayers are limited and have only been accomplished with vibrational spectroscopy. Sum-frequency vibrational spectroscopy (SFG) is surface specific and suitable for amphiphilic monolayer studies. Conformation and orientation information may be obtained from the peak intensities. SFG... [Pg.45]