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- W2794373085 endingPage "3152" @default.
- W2794373085 startingPage "3141" @default.
- W2794373085 abstract "Infrared (IR) spectroscopy is a commonly used and invaluable tool in the studies of solvation phenomena in aqueous solutions. Concurrently, ab initio molecular dynamics (AIMD) simulations deliver the solvation shell picture at a molecular detail level and allow for a consistent decomposition of the theoretical IR spectrum into underlying spatial correlations. Here, we demonstrate how the novel spectral decomposition techniques can extract important information from the computed IR spectra of aqueous solutions of BF4– and PF6–, interesting weakly coordinating anions that have been known for a long time to alter the IR spectrum of water in an unusual manner. The distance-dependent spectra of both ions are analyzed using the spectral similarity method that provides a quantitative picture of both the spectrum of the solute-affected solvent and the number of solvent molecules thus altered. We find, in accordance with previous experiments, a considerable blue shift of the νOH stretching band of liquid water by 264 cm–1 for BF4– and 306 cm–1 for PF6–, with the affected numbers being 3.7 and 4.2, respectively. Considering also the additional information on solute–solvent dipolar couplings delivered by radially and spatially resolved IR spectra, the computational IR spectroscopy based on AIMD simulations is shown to be a viable predictive tool with strong interpretative power." @default.
- W2794373085 created "2018-03-29" @default.
- W2794373085 creator A5013872045 @default.
- W2794373085 date "2018-03-07" @default.
- W2794373085 modified "2023-10-04" @default.
- W2794373085 title "Unusual Influence of Fluorinated Anions on the Stretching Vibrations of Liquid Water" @default.
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