The influence of changes in the structure of hydrogen bonds of water on electrophysical properties of “matrix-water” systems at stepwise heating
N. D. Gavrilova, I. A. Malyshkina
Moscow University Physics Bulletin 2018. N 6.
BBound and free water are present in a wide variety of solids - single crystals, polymers, biopolymers, as well as in media with a hydrogen bond network as in water (2.7$\pm$0.1 Å in length). Some objects behave in the same way as two-component systems (open system) under external influences and demonstrate an abnormal change in properties at the same temperatures as free water. The paper presents the results of studies of temperature behavior of the permittivity, conductivity, and conductivity relaxation time of some hydrophilic polymers, crystallohydrates, and ferroelectrics. The analysis of the results showed that the temperature anomalies of the selected properties are observed in the vicinity of 20, 35, 65-75, and near 100°C, which are “special” temperatures for water: near these temperatures, the destruction of clusters of H2O molecules occurs, and at higher temperatures there is a transition of structural water into a free water. It is possible that the discrete nature of the diffuse temperature peaks of the properties is due to the presence of discrete energy levels of protons in the “matrix-water” system, which at stepwise heating (slow kinetics) leads to a rearrangement or destruction of the OH...O hydrogen bond network, as well as the over-population of the proton levels in the two-minimum potential, the release of deep traps, changes in the set of current carriers, their mobility, and the trajectories of transport in the bulk.Show Abstract