Screened Coulombic Orientational Correlations in Dilute Aqueous Electrolytes
arXiv:1803.10566 · doi:10.1021/acs.jpclett.8b00606
Abstract
The ion-induced long-range orientational order between water molecules recently observed in second harmonic scattering experiments and illustrated with large scale molecular dynamics simulations is quantitatively explained using the Ornstein-Zernike integral equation approach of liquid physics. This general effect, not specific to hydrogen-bonding solvents, is controlled by electroneutrality condition, dipolar interactions and dielectric+ionic screening. As expected, all numerical theories recover the well-known analytical expressions established 40 years ago.
14 pages + SI