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Vibrational resonant inelastic X-ray scattering in liquid acetic acid: a ruler for molecular chain lengths


Savchenko, Viktoriia; Brumboiu, Iulia Emilia; Kimberg, Victor; Odelius, Michael; Krasnov, Pavel; et al; Iannuzzi, Marcella (2021). Vibrational resonant inelastic X-ray scattering in liquid acetic acid: a ruler for molecular chain lengths. Scientific Reports, 11:4098.

Abstract

Quenching of vibrational excitations in resonant inelastic X-ray scattering (RIXS) spectra of liquid acetic acid is observed. At the oxygen core resonance associated with localized excitations at the O–H bond, the spectra lack the typical progression of vibrational excitations observed in RIXS spectra of comparable systems. We interpret this phenomenon as due to strong rehybridization of the unoccupied molecular orbitals as a result of hydrogen bonding, which however cannot be observed in x-ray absorption but only by means of RIXS. This allows us to address the molecular structure of the liquid, and to determine a lower limit for the average molecular chain length.

Abstract

Quenching of vibrational excitations in resonant inelastic X-ray scattering (RIXS) spectra of liquid acetic acid is observed. At the oxygen core resonance associated with localized excitations at the O–H bond, the spectra lack the typical progression of vibrational excitations observed in RIXS spectra of comparable systems. We interpret this phenomenon as due to strong rehybridization of the unoccupied molecular orbitals as a result of hydrogen bonding, which however cannot be observed in x-ray absorption but only by means of RIXS. This allows us to address the molecular structure of the liquid, and to determine a lower limit for the average molecular chain length.

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Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Health Sciences > Multidisciplinary
Uncontrolled Keywords:Multidisciplinary
Language:English
Date:1 December 2021
Deposited On:15 Nov 2021 09:31
Last Modified:27 Jan 2022 08:44
Publisher:Nature Publishing Group
ISSN:2045-2322
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1038/s41598-021-83248-3
Project Information:
  • : FunderSwedish Insitute
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  • : FunderVetenskapsrÃ¥det
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  • : FunderCarl Tryggers Stiftelse för Vetenskaplig Forskning
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  • : FunderStockholm University
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  • Content: Published Version
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)