Kinetic Studies of UV/Vis-Chemiluminescence in the CH + O2 Gas Phase Reaction
Abstract
CO uv/vis-chemiluminescence has been observed for the first time in the 248-nm photodissociation of a trace amount of bromoform (CHBr3) vapor present in an excess of O2 and in diluent helium carrier gas at 2 torr and at 298 K. The integrated intensities of the time-resolved chemiluminescence traces due to characteristic CO(A-X), CO(a-X) and CO(d-a) vibronic emissions showed quadratic dependence on the 248-nm photolysis laser fluence used. The decay kinetics of these chemiluminescences was studied as a function of added H2, D2, N2, CH4, O2 and CHBr3, and comparisons made to the behavior of the concurrently recorded OH(A-X)-chemiluminescence in the system. The CH(X2II) + O2 reaction has previously been identified as the main source for the OH(A-X) emissions in such photolyses.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 19, 2003
- Accession Number
- ADA412562
Entities
People
- Ghanshyam L Vaghjiani