Photodissociation dynamics of tert-butyl hydroperoxide at 266 nm

Degenerate four-wave mixing observation of OH state distribution

Dong Chan Kim, Keon Woo Lee, Kyung Hoon Jung, Jae Won Hahn

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Degenerate four-wave mixing spectroscopy has been used to study the photodissociation dynamics of tert-butyl hydroperoxide (t-BuOOH) at 266 nm, long-wavelength tail of the ultraviolet (UV) absorption continuum. The nascent rotational distributions, spin-orbit state ratio, and Λ-doublet population ratio of the OH (X2Π) fragments have been extracted. No vibrationally excited OH was observed. The rotational distribution peaked at N=5. The average rotational energy was estimated to be 4.2% of the available energy. A slight preference for the Π- Λ-doublet component and a statistical distribution of the spin-orbit states were observed. The experimental observations are similar to those found for OH from H2O2 photodissociation and are consistent with dissociation via a repulsive excited state.

Original languageEnglish
Pages (from-to)1698-1703
Number of pages6
JournalJournal of Chemical Physics
Volume109
Issue number5
DOIs
Publication statusPublished - 1998 Dec 1

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Photodissociation
tert-Butylhydroperoxide
Four wave mixing
four-wave mixing
photodissociation
Orbits
orbits
ultraviolet absorption
statistical distributions
Excited states
fragments
Spectroscopy
dissociation
continuums
Wavelength
energy
wavelengths
spectroscopy
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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title = "Photodissociation dynamics of tert-butyl hydroperoxide at 266 nm: Degenerate four-wave mixing observation of OH state distribution",
abstract = "Degenerate four-wave mixing spectroscopy has been used to study the photodissociation dynamics of tert-butyl hydroperoxide (t-BuOOH) at 266 nm, long-wavelength tail of the ultraviolet (UV) absorption continuum. The nascent rotational distributions, spin-orbit state ratio, and Λ-doublet population ratio of the OH (X2Π) fragments have been extracted. No vibrationally excited OH was observed. The rotational distribution peaked at N″=5. The average rotational energy was estimated to be 4.2{\%} of the available energy. A slight preference for the Π- Λ-doublet component and a statistical distribution of the spin-orbit states were observed. The experimental observations are similar to those found for OH from H2O2 photodissociation and are consistent with dissociation via a repulsive excited state.",
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Photodissociation dynamics of tert-butyl hydroperoxide at 266 nm : Degenerate four-wave mixing observation of OH state distribution. / Kim, Dong Chan; Lee, Keon Woo; Jung, Kyung Hoon; Hahn, Jae Won.

In: Journal of Chemical Physics, Vol. 109, No. 5, 01.12.1998, p. 1698-1703.

Research output: Contribution to journalArticle

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