Manifestation of the thermal motion of ions in the conductivity spectrum of liquid water

Abstract

The nonresonant component of the dynamic conductivity spectrum of liquid water in the frequency range of 104–1014 Hz is described by a model of free charged particles participating in thermal motion. The background of IR spectrum is represented by the diffusion response of elementary charges in the form of protons, holes, and H3O+ and OH– ions; terahertz loss (1010 Hz) is a response of the same ions in hydrate shells; microwave absorption at frequencies below 107 Hz is represented by the response of the same ions surrounded by the hydrate shell and additionally by the ionic atmosphere.