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

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 spect...

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Bibliographic Details
Published in:Scientific reports 2021-02, Vol.11 (1), p.4098-4098, Article 4098
Main Authors: Savchenko, Viktoriia, Brumboiu, Iulia Emilia, Kimberg, Victor, Odelius, Michael, Krasnov, Pavel, Liu, Ji-Cai, Rubensson, Jan-Erik, Björneholm, Olle, Såthe, Conny, Gråsjö, Johan, Dong, Minjie, Pietzsch, Annette, Föhlisch, Alexander, Schmitt, Thorsten, McNally, Daniel, Lu, Xingye, Polyutov, Sergey P., Norman, Patrick, Iannuzzi, Marcella, Gel’mukhanov, Faris, Ekholm, Victor
Format: Article
Language:English
Subjects:
639/638/440/94
639/638/563/981
639/766/119/1002
639/766/36/1121
639/766/94
Acetic acid
Acids
Atom and Molecular Physics and Optics
Atom- och molekylfysik och optik
Chemistry
Energy
Fysik
Humanities and Social Sciences
Hydrogen bonding
Hydrogen bonds
multidisciplinary
Natural Sciences
Naturvetenskap
Physical Sciences
Physics
Radiation
Science
Science (multidisciplinary)
X-ray scattering
X-rays
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Summary: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.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-83248-3