The dynamics of Br( 2P j) formation in the photodissociation of vinyl and perfluorovinyl bromides

Kyoung Seok Lee, Keon Woo Lee, Tae Kyu Kim, Ryong Ryoo, Kyung Hoon Jung

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The photodissociation dynamics of vinyl bromide and perfluorovinyl bromide have been investigated at 234 nm using a photofragment ion imaging technique coupled with a state-selective [2+1] resonance-enhanced multiphoton ionization scheme. The nascent Br atoms stem from the primary C-Br bond dissociation leading to the formation of C 2H 3(X̃) and Br( 2P j;j=1/2,3/2). The obtained translational energy distributions have been well fitted by a single Boltzmann and three Gaussian functions. Boltzmann component has not been observed in the perfluorovinyl bromide. The repulsive 3A (n, σ *) state has been considered as the origin of the highest Gaussian components. Middle translational energy components with Gaussian shapes are produced from the 1A (π, σ *) and/or 3A (π, σ *) which are very close in energy. Low-energy Gaussian components are produced via predissociation from the 3A (π,π *) state. The assignments have also been supported by the recoil anisotropy corresponding to the individual components. It is suggested that intersystem crossing from the triplet states to the ground state has been attributed to the Boltzmann component and the fluorination reduces the probability of this electronic relaxation process.

Original languageEnglish
Article number034308
JournalJournal of Chemical Physics
Volume122
Issue number3
DOIs
Publication statusPublished - 2005 Aug 8

Fingerprint

Photodissociation
Bromides
photodissociation
bromides
Fluorination
Relaxation processes
Ground state
Ionization
Anisotropy
Ions
Imaging techniques
Atoms
fluorination
stems
imaging techniques
atomic energy levels
vinyl bromide
energy
energy distribution
dissociation

All Science Journal Classification (ASJC) codes

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

Cite this

Lee, Kyoung Seok ; Lee, Keon Woo ; Kim, Tae Kyu ; Ryoo, Ryong ; Jung, Kyung Hoon. / The dynamics of Br( 2P j) formation in the photodissociation of vinyl and perfluorovinyl bromides. In: Journal of Chemical Physics. 2005 ; Vol. 122, No. 3.
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The dynamics of Br( 2P j) formation in the photodissociation of vinyl and perfluorovinyl bromides. / Lee, Kyoung Seok; Lee, Keon Woo; Kim, Tae Kyu; Ryoo, Ryong; Jung, Kyung Hoon.

In: Journal of Chemical Physics, Vol. 122, No. 3, 034308, 08.08.2005.

Research output: Contribution to journalArticle

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