REMPI detection of singlet oxygen 1O2 arising from UV-photodissociation of van der Waals complex isoprene-oxygen C5H8-O2

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Abstract

The one-laser two-color resonance enhanced multiphoton ionization REMPI [(1 + 1′) + 1] and velocity map imaging have been applied to investigate formation of molecular oxygen in excited singlet O2(a1Δg) and ground O2(X3Σg -) states in the photodissociation of van der Waals complex isoprene-oxygen C5H8-O2. These molecules were found to appear in the different rotational states with translational energy varied from a value as low as ∼1 meV to a distribution with temperature of about 940 K. The observed traces of electron recoil in the images of photoions reveal participation of several ionization pathways of the resonantly excited intermediate states of O2.

Original languageEnglish
Pages (from-to)271-276
Number of pages6
JournalChemical Physics Letters
Volume692
DOIs
Publication statusPublished - 16 Jan 2018

Keywords

  • MOLECULAR-OXYGEN
  • GAS-PHASE
  • PHOTOELECTRON
  • EXCITATION
  • PHOTOCHEMISTRY
  • SPECTROSCOPY
  • CLUSTERS
  • DYNAMICS
  • O-2
  • NM

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