HIGH RESOLUTION LASER SPECTROSCOPY OF AROMATIC IONS AND FREE RADICALS
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Date
1988
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
High resolution, laser-induced fluorescence spectra of a number of aromatic chemical intermediates that are subject to Jahn-Teller distortion have been recorded. The ions or radicals were prepared by the uv photolysis of precursors seeded in a supersonic free-jet expansion. The hot ions or radicals were cooled in the expansion and probed downstream with an argon-ion pumped cw ring dye laser (1 MHz FWHM linewidth, 100-400 mW output power) seeded into an excimer pumped pulse amplifier (-100 MHz FWHM linewidth, 3-10 ml/pulse output energy at 30 Hz rep. rate) which is synchronized to the photolysis laser. Sub-doppler LIF spectra were obtained by imaging the total fluorescence through optical slits which viewed a very narrow, central portion of the jet expansion. The experimental arrangement will be detailed and rotationally resolved spectra of $C_{6}F_{6}{^{+}}, C_{6}F_{3}H_{3}{^{+}}$ and $C_{5}H_{6}$ will be presented.
Description
Author Institution: Laser Spectroscopy Facility, Department of Chemistry, The Ohio State University; Department of Chemistry, Florida State University