Photodissociation of OClO: REMPI study of primary photofragments

Journal Article · Thu Apr 05 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100370a047· OSTI ID:6629630

Ruehl, E; Jefferson, A; Vaida, V ^[1]

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1. Univ. of Colorado, Boulder (USA)

The photochemistry of OClO is investigated by using REMPI-MS of samples in the collision-free conditions of a molecular jet. Strong wavelength-dependent ClO{sup +} and Cl{sup +} mass signals are measured on near-UV photolysis of OClO(A({sup 2}A{sub 2}) {l arrow} X({sup 2}B{sub 1})). The spectra, recorded between 335 and 370 nm for the fragment ClO{sup +} (m/z = 51), show a variety of resonances corresponding to ClO A({sup 2}{Pi}{sub i}) {l arrow} X({sup 2}{Pi}{sub i}) one-photon excitation and C({sup 2}{Sigma}) {l arrow} X({sup 2}{Pi}{sub i}) two-photon excitation of vibrationally excited ClO ({upsilon} = 3-6). The formation of this fragment is consistent with a photochemical mechanism involving isomerization of OClO to ClOO with the latter dissociating further to Cl + O{sub 2}. Possible implications of OClO photochemistry on polar ozone depletion are briefly discussed.

• OSTI ID: 6629630
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:7; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
ATMOSPHERIC CHEMISTRY
CHALCOGENIDES
CHEMISTRY
CHLORINE COMPOUNDS
CHLORINE OXIDES
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
INFORMATION
LAYERS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
OZONE LAYER
PHOTOCHEMISTRY