Photodissociation of OClO: REMPI study of primary photofragments
- 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
Similar Records
Femtosecond pump-probe studies of actinic-wavelength dependence in aqueous chlorine dioxide photochemistry
The photodissociation of ClO{sub 2}: Potential energy surfaces of OClO{r_arrow}Cl+O{sub 2}