Solvation Structure of NaI on the Surface of Ethanol Solution

Abstract

An ethanol solution of sodium iodide (NaI) was introduced into a vacuum as a continuous liquid flow (liquid beam), and the surface of the solution was illuminated by a laser with a wavelength of 118 nm. The kinetic energies of photoelectrons emitted from the surface were measured as a function of NaI concentration in the solution. The photoelectron spectra thus obtained exhibit peaks associated with I− and (NaI)n which are solvated by ethanol. It was concluded that NaI aggregates into clusters, (NaI)n, on the ethanol solution surface, in agreement with previous photo-ion mass spectrometry studies.