Photofragmentation of gas-phase acetic acid and acetamide clusters in the vacuum ultraviolet region

Research output: Contribution to journalArticle


Photofragmentation of gas-phase acetamide and acetic acid clusters produced by a supersonic expansion source has been studied using time-of-flight mass spectrometry and the partial ion yield (PIY) technique combined with tunable vacuum-ultraviolet synchrotron radiation. Appearance energies of the clusters and their fragments were experimentally determined from the PIY measurements. The effect of clusterization conditions on the formation and fragmentation of acetic acid clusters was investigated. Ab initio quantum mechanical calculations were performed on both samples' dimers to find their neutral and ionized geometries as well as proton transfer energy barriers leading to the optimal geometries. In the case of the acetamide dimer, the reaction resulting in the production of ammoniated acetamide was probed, and the geometry of the obtained ion was calculated.


  • Marta Berholts
  • Hanna Myllynen
  • Kuno Kooser
  • Eero Itälä
  • Sari Granroth
  • Helena Levola
  • Joakim Laksman
  • Shabnam Oghbaiee
  • Bart Oostenrijk
  • Ergo Nõmmiste
  • Edwin Kukk
External organisations
  • University of Turku
  • University of Tartu
  • European XFEL GmbH
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Chemistry
Original languageEnglish
Article number194302
JournalJournal of Chemical Physics
Issue number19
Publication statusPublished - 2017 Nov 21
Publication categoryResearch

Related research output

Oostenrijk, B., 2018 Sep, Lund: Lund University, Faculty of Science, Department of Physics, Division of Synchrotron Radiation Research. 234 p.

Research output: ThesisDoctoral Thesis (compilation)

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