Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Isomeric Trimethylbenzyl Radicals Produced by Corona Discharge of 1,2,3,5-Tetramethylbenzene

  • Lee, Gi-Woo (Department of Chemistry, Korea University) ;
  • Yoon, Young-Wook (Department of Chemistry and The Chemistry Institute for Functional Materials, Pusan National University) ;
  • Lee, Sang-Kuk (Department of Chemistry and The Chemistry Institute for Functional Materials, Pusan National University)
  • Received : 2011.06.11
  • Accepted : 2011.06.30
  • Published : 2011.09.20
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Abstract

Isomeric trimethylbenzyl radicals were generated and vibronically excited from precursor 1,2,3,5-tetramethylbenzene, isodurene, with a large amount inert carrier gas helium in a corona excited supersonic expansion (CESE) using a pinhole-type glass nozzle. A long-path monochromator was used to record the visible vibronic emission spectra of the jet-cooled benzyl-type radicals in the $D_1{\rightarrow}D_0$ electronic transition. From the analysis of the spectra, we identified the evidence of the presence of three isomeric trimethylbenzyl radicals in the corona discharge, and obtained the electronic energy and a few vibrational mode frequencies in the ground electronic state for each isomer.

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References

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