Observation of vibronic emission spectra of difluorobenzyl radicals: Jet-cooled 2,5-difluorobenzyl radical

Hyeon Geun Ahn, Gi Woo Lee, Tae Kyu Kim, Sang Kuk Lee

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report the first spectroscopic observation of jet-cooled 2,5-difluorobenzyl radical produced from 2,5-difluorotoluene seeded in a large amount of inert carrier gas He and vibronically excited in a corona excited supersonic expansion using a pinhole-type glass nozzle. The visible vibronic emission spectrum of the jet-cooled 2,5-difluorobenzyl radical recorded with a long path monochromator was analyzed to obtain an accurate measurement of the electronic transition between the D1 and D0 electronic states. The vibrational mode frequencies in the ground electronic state were determined by comparison with those of 2,5-difluorotoluene as well as those from an ab initio calculation.

Original languageEnglish
Pages (from-to)207-211
Number of pages5
JournalChemical Physics Letters
Volume454
Issue number4-6
DOIs
Publication statusPublished - 2008 Mar 20

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Electronic states
emission spectra
Monochromators
electronics
Nozzles
Gases
pinholes
monochromators
visible spectrum
Glass
coronas
nozzles
vibration mode
expansion
glass
gases
difluorotoluene

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "We report the first spectroscopic observation of jet-cooled 2,5-difluorobenzyl radical produced from 2,5-difluorotoluene seeded in a large amount of inert carrier gas He and vibronically excited in a corona excited supersonic expansion using a pinhole-type glass nozzle. The visible vibronic emission spectrum of the jet-cooled 2,5-difluorobenzyl radical recorded with a long path monochromator was analyzed to obtain an accurate measurement of the electronic transition between the D1 and D0 electronic states. The vibrational mode frequencies in the ground electronic state were determined by comparison with those of 2,5-difluorotoluene as well as those from an ab initio calculation.",
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Observation of vibronic emission spectra of difluorobenzyl radicals : Jet-cooled 2,5-difluorobenzyl radical. / Ahn, Hyeon Geun; Lee, Gi Woo; Kim, Tae Kyu; Lee, Sang Kuk.

In: Chemical Physics Letters, Vol. 454, No. 4-6, 20.03.2008, p. 207-211.

Research output: Contribution to journalArticle

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AB - We report the first spectroscopic observation of jet-cooled 2,5-difluorobenzyl radical produced from 2,5-difluorotoluene seeded in a large amount of inert carrier gas He and vibronically excited in a corona excited supersonic expansion using a pinhole-type glass nozzle. The visible vibronic emission spectrum of the jet-cooled 2,5-difluorobenzyl radical recorded with a long path monochromator was analyzed to obtain an accurate measurement of the electronic transition between the D1 and D0 electronic states. The vibrational mode frequencies in the ground electronic state were determined by comparison with those of 2,5-difluorotoluene as well as those from an ab initio calculation.

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