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Updated: Feb 21, 2026
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Ultrafast X-ray absorption study of longitudinal-transverse phonon coupling in electrolyte aqueous solution
Yishuo Jiao1, Bernhard W Adams, Asmus Ougaard Dohn
1Department of Chemistry, Brown University, 324 Brook St., Box H, Providence, RI 02912, USA. crosepet@brown.edu.
Abstract:
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.
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