How Salt Solvation Slows Water Dynamics While Blue-Shifting Its Dielectric Spectrum.

ABSTRACT: Water inherently contains trace amounts of various salts, yet the microscopic processes by which salts influence some of its physical properties remain elusive. Notably, the mechanisms that reduce the dielectric constant of water upon salt addition are still debated. The primary absorption peak for electromagnetic radiation─commonly used in microwave heating─shifts toward higher frequencies in saline solutions, suggesting faster water molecular dynamics. This observation, however, contrasts with the simultaneous increase in viscosity and experimental reports that ionic solutes would slow down water molecular motion. In this work, we use molecular dynamics (MD) simulations with deep-neural-network models trained on high-quality quantum mechanical data to mimic interatomic forces and molecul

SUBMITTER: Pabst F 

PROVIDER: S-EPMC12337140 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature