Probe of I(2Pj) atoms using two-photon resonant four-wave mixing spectroscopy following the 266-nm photodissociations of various alkyl and perfluoroalkyl iodides

Kyoung Seok Lee, Keon Woo Lee, Sang Kuk Lee, Kyung Hoon Jung, Tae Kyu Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Two-photon resonant four-wave mixing spectroscopy has been utilized successfully for probing I and I* nascent from the 266 nm photodissociations of various alkyl and perfluoroalkyl iodides. The relative quantum yields for I*, as well as the recoil anisotropy parameters, were extracted. Recoil anisotropy parameters close to the limit value for parallel transition indicates that the ground-state I(2P3/2) originates from the curve crossing from the initially prepared 3Q0 to 1Q1 state. The curve-crossing probabilities for alkyl and perfluoroalkyl iodides were obtained and tried to explain using the well-known Landau-Zener model. In the cases of perfluoroalkyl iodides, it is necessary to consider the fluorination effect to describe the detailed dynamics observed in this study and has been revealed that the electronic effect due to fluorine atom substitution is dominant, leading to decrease in the curve-crossing probability.

Original languageEnglish
Pages (from-to)43-50
Number of pages8
JournalJournal of Molecular Spectroscopy
Volume249
Issue number1
DOIs
Publication statusPublished - 2008 May 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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