Vibrational deactivation studies of OH X 2Π (ν = 1-5) by N2 and O2

Luca D'Ottone; Dieter Bauer; Pedro Campuzano-Jost; Melissa Fardy; Anthony J. Hynes

doi:10.1039/b407297a

Vibrational deactivation studies of OH X ²Π (ν = 1-5) by N₂ and O₂

Luca D'Ottone, Dieter Bauer, Pedro Campuzano-Jost, Melissa Fardy, Anthony J. Hynes

Atmospheric Sciences

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

The deactivation kinetics of vibrationally excited OH X ²Π (ν = 1-5) were studied using a pulsed laser photolysis-pulsed laser induced fluorescence technique. Temporal profiles of OH (ν) were obtained by exciting off-diagonal (Δν = -1,-3) transitions in the A-X band of OH and monitoring the diagonal, blue shifted fluorescence. Photolysis of O₃ at 266 nm was used to produce O¹D which reacted rapidly with H ₂, CH₄ and H₂O to produce OH (ν). Deactivation rate coefficients for OH (ν = 1-5) with O₂ and N ₂ and for OH (ν = 2,1) with O₃ were obtained. The deactivation rate coefficients show an exponential dependence on vibrational level for both O₂ and N₂, however O₂ is much more efficient.

Original language	English (US)
Pages (from-to)	4276-4282
Number of pages	7
Journal	Physical Chemistry Chemical Physics
Volume	6
Issue number	17
DOIs	https://doi.org/10.1039/b407297a
State	Published - Sep 7 2004

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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abstract = "The deactivation kinetics of vibrationally excited OH X 2Π (ν = 1-5) were studied using a pulsed laser photolysis-pulsed laser induced fluorescence technique. Temporal profiles of OH (ν) were obtained by exciting off-diagonal (Δν = -1,-3) transitions in the A-X band of OH and monitoring the diagonal, blue shifted fluorescence. Photolysis of O3 at 266 nm was used to produce O1D which reacted rapidly with H 2, CH4 and H2O to produce OH (ν). Deactivation rate coefficients for OH (ν = 1-5) with O2 and N 2 and for OH (ν = 2,1) with O3 were obtained. The deactivation rate coefficients show an exponential dependence on vibrational level for both O2 and N2, however O2 is much more efficient.",

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AU - D'Ottone, Luca

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AU - Fardy, Melissa

AU - Hynes, Anthony J.

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