Scaling of Suprastructure and Dynamics in Pure and Mixed Debye Liquids

Abstract

Supramolecular relaxations of the Debye or near-Debye type are featured by monohydroxy alcohols, water, and several other liquids. Mainly focusing on results from broadband dielectric spectroscopy, shear rheology, X-ray diffraction, and near-infrared absorption, scaling properties of chain-forming and ring-forming monohydroxy alcohols are examined. Deviations from ideal-mixing behavior in binary solutions involving these liquids in their supercooled state are given particular attention. The present survey is selective rather than comprehensive with a focus on exciting recent developments in this scientific area. Although most of the research summarized in this chapter is based on experiments and analyses carried out under linear-response and ambient-pressure conditions, phenomena emerging beyond these regimes are briefly touched upon as well. Finally, aiming at a faithful representation of the molecular dynamics taking place in these liquids at the microscopic level, overarching aspects arising from the complementary application of experimental techniques as well as perspectives for future developments are discussed.