Kinetics of the reaction of HSO with O3 at temperatures 273-423 K

Yin Yu Lee, Yuan-Pern Lee*, Niann-Shiah Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The rate coefficient of the reaction of HSO with O3 at five temperatures in the range 273-423 K was determined by means of the discharge-flow/laser-induced-fluorescence technique. The laser-induced fluorescence of HSO was detected by the gated photon-counting technique; a detection limit ∼4×109 molecules cm-3 was achieved. The reaction was carried out under pseudo-first-order conditions with [O3]>[HSO]; the rate coefficient was determined to be k = (4.7 ± 1.0) × 10-14 cm3 molecule-1 s-1 at 298 K, approximately 30% greater than, but within experimental uncertainty of the only previous measurement by Wang and Howard by means of the discharge-flow/laser-magnetic-resonance technique. The temperature dependence of the rate coefficient is expressed in the Arrhenius form, k(T) = (2.1 ± 0.7) × 10-12 exp[-(1120 ± 320)/ T] cm3 molecule-1 s-1.

Original languageEnglish
Pages (from-to)387-392
Number of pages6
JournalThe Journal of chemical physics
Issue number1
StatePublished - 1 Jan 1994

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