ROTATIONAL ANALYSIS OF THE NEAR INFRARED SINGLET-TRIPLET ELECTRONIC SPECTRUM OF OZONE
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Date
1999
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
High Resolution Fourier Transform Infrared Spectrometry was used to study the rotational fine structure of the lowest energy singlet-triplet electronic spectrum of ozone, $^{16}O_{3}$ and $^{18}O_{3}$ near $9300 cm^{-1}$. With a near pure case (b) coupling model, approximately 100 lines were assigned in the spectrum of $^{16}O_{3}$. A combined least-squares/band contour analysis yielded an overall standard deviation of $0.045 cm^{-1}$. The fit to the ${^{18}}O_{3}$ spectrum used approximately 30 lines and gave a slightly higher overall standard deviation. The rotational analysis has established that the upper state is ${^{3}}A_{2}$ in agreement with recent theoretical calculations. Numerous perturbations are observed in the spectrum of both isotopomers and limited our least-squares fit to the three rotational constants, the symmetric top distortion constants, the three spin-rotation constants and the alpha spin-spin constant. The talk will feature an overview of the rotational analysis along with a brief discussion of the perturbations seen in the spectrum.
Description
Author Institution: Laboratoire de Spectrom\'{e}trie lonique et Mol\'{e}culaire (associ\'{e} au CNRS U.M.R. 5579), Universit\'{e} Claude Bernard Lyon; Laboratoire de Chimie-Physique, Facult\'{e} des Sciences de Reims; Department of Chemistry, University of Wisconsin-Parkside