Wide temperature range kinetics of the O+CHF3 reaction

Citation
A. Fernandez et A. Fontijn, Wide temperature range kinetics of the O+CHF3 reaction, J PHYS CH A, 105(35), 2001, pp. 8196-8199
Citations number
20
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY A
ISSN journal
1089-5639 → ACNP
Volume
105
Issue
35
Year of publication
2001
Pages
8196 - 8199
Database
ISI
SICI code
1089-5639(20010906)105:35<8196:WTRKOT>2.0.ZU;2-#
Abstract
Rate coefficients for the depletion of ground-state oxygen atoms by CHF3 ha ve been measured using a hie, temperature photochemistry (HTP) reactor. The O atoms were generated by the vacuum ultraviolet (VUV) flash photolysis of either SO2, O-2, Or CO2, and their relative concentrations were monitored by resonance fluorescence. The data are best fitted by the expression k(630 -940 K) = 2.5 X 10(-11) exp(-7236 K/T) cm(3) molecule(-1) s(-1). The data a re contiguous with those from an earlier laser-photolysis shock-tube study for temperatures ranging from 960 to 1330 K. A fit to the combined data yie lds the recommendation k(630-1330 K) = 5.1 X 10(-11) exp(-9536 K/T) cm(3) m olecule(-1) s(-1), with 2 sigma precision levels varying from +/-8 and +/- 22% and corresponding suggested accuracy levels of +/- 22 to +/- 29%. Trans ition-state theory predictions, made using input data from a literature ab initio study, are in excellent agreement with this recommendation over the entire temperature domain.