Ultrafast X-ray absorption study of longitudinal-transverse phonon coupling in electrolyte aqueous solution

Yishuo Jiao, Bernhard W. Adams, Asmus Ougaard Dohn, Klaus Braagaard Møller, Hannes Jonsson, Christoph Rose-Petruck

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Ultrafast X-ray absorption spectroscopy is applied to study the conversion of longitudinal to transverse phonons in aqueous solution. Permanganate solutes serve as X-ray probe molecules that permit the measurement of the conversion of 13.5 GHz, longitudinal phonons to 27 GHz, transverse phonons that propagate with high-frequency sound speed. The experimental results, combined with QM/MM MD simulations, show that the hydrogen bond network around the charged solutes has a glass-like stiffness that persists for at least tens of picoseconds.
Original languageEnglish
JournalPhysical Chemistry Chemical Physics
Issue number40
Pages (from-to)27266-27274
Publication statusPublished - 2017

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