Photoelectron imaging and photodissociation of ozonide in O3(-)â
(O2)n (n = 1-4) clusters.
J Chem Phys
; 142(12): 124305, 2015 Mar 28.
Article
en En
| MEDLINE
| ID: mdl-25833577
ABSTRACT
The photoelectron images of O3 (-) and O3 (-) â
(O2)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(-) photofragments. Several spectra also exhibit autodetachment of vibrationally excited O2 (-) photofragments. Comparison of the bare O3 (-) photoelectron spectra to that of the complexes shows that the O3 (-) core is preserved upon clustering with several O2 molecules, though subtle changes in the Franck-Condon profile of the ground state photodetachment transition suggest some charge transfer from O3 (-) to the O2 molecules. The electron affinities of the complexes increase by less than 0.1 eV with each additional O2 molecule, which is comparable to the corresponding binding energy [K. Hiraoka, Chem. Phys. 125, 439-444 (1988)]. The relative intensity of the photofragment O(-) detachment signal to the O3 (-) â
(O2)n direct detachment signal increases with cluster size. O2 (-) autodetachment signal is only observed in the O3 (-), O3 (-) â
(O2)3, and O3 (-) â
(O2)4 spectra, suggesting that the energy of the dissociative state also varies with the number of O2 molecules present in the cluster.
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Colección:
01-internacional
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MEDLINE
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En
Revista:
J Chem Phys
Año:
2015
Tipo del documento:
Article
País de afiliación:
Estados Unidos