Spectroscopic Identification of New Benzyl-Type Radicals in Corona Excitation: CHLORO-α-METHYLBENZYL Radicals

Details Spectroscopic Identification of New Benzyl-Type Radicals in Corona Excitation: CHLORO-α-METHYLBENZYL Radicals Spectroscopic Identification of New Benzyl-Type Radicals in Corona Excitation: CHLORO-α-METHYLBENZYL Radicals

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mss..confemi14y&link_type=abstract

"International Symposium On Molecular Spectroscopy, 65th Meeting, Held 21-25 June, 2010 at Ohio State University. http://molspec

Physics

Radicals And Ions

Scientific paper

Using a pinhole-type glass nozzle coupled with corona excited supersonic expansion (CESE), precursors o- and p-chloro-ethylbenzenes seeded in a large amount of inert carrier gas helium were corona discharged to produce jet-cooled benzyl-type radicals. The vibronic emission spectra were recorded with a long path monochromator to observe vibronic bands of benzyl-type radicals in the visible region. The analysis of the spectra shows the evidence of the o- and p-chlorobenzyl radicals as typical products in corona excitation as well as the o- and p-chloro-α-methylbenzyl radicals as unexpected species. After subtracting the bands belonging to chlorobenzyl radicals, we could construct the vibronic emission spectra of the o- and p-chloro-α-methylbenzyl radical in the D_1 → D_0 electronic transition at the gas phase. By comparing with those of ab initio calculation and of the known vibrational mode frequencies with similar structures, we could obtain the electronic transition and assign the vibrational modes to the bands observed.
H. G. Ahn, G. W. Lee, and S. K. Lee J. Phys. Chem. A, 112 (51), 13427 (2008).

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