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Title: Photoelectron imaging and photodissociation of ozonide in O{sub 3}{sup −} ⋅ (O{sub 2}){sub n} (n = 1-4) clusters

The photoelectron images of O{sub 3}{sup −} and O{sub 3}{sup −} ⋅ (O{sub 2}){sub n} (n = 1–4) have been measured using 3.49 eV photon energy. The spectra exhibit several processes, including direct photodetachment and photodissociation with photodetachment of O{sup −} photofragments. Several spectra also exhibit autodetachment of vibrationally excited O{sub 2}{sup −} photofragments. Comparison of the bare O{sub 3}{sup −} photoelectron spectra to that of the complexes shows that the O{sub 3}{sup −} core is preserved upon clustering with several O{sub 2} molecules, though subtle changes in the Franck-Condon profile of the ground state photodetachment transition suggest some charge transfer from O{sub 3}{sup −} to the O{sub 2} molecules. The electron affinities of the complexes increase by less than 0.1 eV with each additional O{sub 2} molecule, which is comparable to the corresponding binding energy [K. Hiraoka, Chem. Phys. 125, 439-444 (1988)]. The relative intensity of the photofragment O{sup −} detachment signal to the O{sub 3}{sup −} ⋅ (O{sub 2}){sub n} direct detachment signal increases with cluster size. O{sub 2}{sup −} autodetachment signal is only observed in the O{sub 3}{sup −}, O{sub 3}{sup −} ⋅ (O{sub 2}){sub 3}, and O{sub 3}{sup −} ⋅ (O{sub 2}){sub 4} spectra, suggesting thatmore » the energy of the dissociative state also varies with the number of O{sub 2} molecules present in the cluster.« less
Authors:
; ;  [1]
  1. Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 40405 (United States)
Publication Date:
OSTI Identifier:
22415562
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 142; Journal Issue: 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AFFINITY; BINDING ENERGY; COMPARATIVE EVALUATIONS; DISSOCIATION; EV RANGE; GROUND STATES; IMAGES; MOLECULAR CLUSTERS; MOLECULES; OZONE; PHOTOELECTRON SPECTROSCOPY; PHOTOLYSIS; PHOTONS