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Effects of dispersion interactions on the dynamics of water in bromide ion hydration shells have been studied by first principles simulations using a dispersion corrected density functional. The dynamics of vibrational spectral diffusion and its relations to hydrogen bond dynamics have been investigated for two different ion concentrations. It is found that the vibrational spectral diffusion of water...
A theoretical study of vibrational spectral diffusion in aqueous NaBr solutions is presented by means of ab initio molecular dynamics simulations and time series analysis. The OD stretch frequencies of deuterated water hydrogen bonded to the bromide ions are found to be higher than those in the bulk which implies a somewhat weaker Br–water hydrogen bonds than those between water molecules. The dependence...
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