Molecular Behavior at Liquid Interfaces Investigated by Sum-Frequency Generation Spectroscopy

Abstract

Currently, sum frequency generation (SFG) spectroscopy is widely recognized as a surface and interface specific vibrational spectroscopic technique. Various physical and chemical properties at the liquid interfaces are strongly correlated with the molecular behavior at the surfaces and interfaces, and it is essential to observe their behavior in-situ. In this paper, we present (1) the analysis of molecular orientation of aqueous solution surfaces of the natural surfactants, (2) the relationship between molecular orientation and the foam stability on beer surfaces, and (3) the relationship between molecular conformation and liquid repellent performance on alkylsilane surfaces exhibiting water repellent properties.

graphical abstract