Abstract
Room temperature ionic liquids (RTILs) are very unique substances which may form interfaces with polar and/or non-polar liquids. Though their macroscopic and/or phenomenological physico-chemical properties have been investigated so far, microscopic or local structural knowledge at the interface is very limited and the overall problems related to the interface still remain unsolved. In this paper, we have reviewed our series of experimental results on surfaces or buried interfaces (liquid/liquid and liquid/solid interfaces) by using X-ray reflectivity and diffraction measurements as well as IR-Vis sum-frequency generation spectroscopy. Heterogeneous and complex systems of such interfaces may explain various functions of ionic liquids occurring at the interfaces.
