HIGH RESOLUTION, ROTATIONALLY RESOLVED ELECTRONIC SPECTRA OF $CF_{3}S$ AND $CF_{3}O$

Loading...
Thumbnail Image

Date

1995

Journal Title

Journal ISSN

Volume Title

Publisher

Ohio State University

Research Projects

Organizational Units

Journal Issue

Abstract

We have previously presented the high resolution rotationally resolved laser induced fluorescence excitation spectrum of the origin band of the $\tilde{A}^{2}A_{1} \leftarrow \tilde{X}^{2}E$ electronic transition of $CF_{3}O^{a}$. We have now obtained rotationally resolved spectra for other vibrational bands of $CF_{3}O$. In addition, we have obtained similar electronic spectra involving several vibrational transitions of $CF_{3}S$. In both molecules, we observe excited vibrational states which are totally symmetric and ones of e symmetry, transitions to the latter probably being caused by the Jahn-Teller effect in the ground $^{2}E$ state. In $CF_{3}O$, the rotational structure of e - e vibronic transitions is much more congested than that of a - e vibronic transitions. This is because the allowed rotational transitions in the a - e bands are $|\Delta K|=0$ and 1; while the allowed transitions of the a - e bands are $|\Delta K|=1$. Nevertheless, the rotational structure of the e - e bands of $CF_{3}S$ is less congested than that of the a - e bands. The rotational transitions of the e - e bands can be divided into several sub-groups with each sub-group containing a few rotational transitions and with the sub-groups separated by about $0.5 cm^{-1}$. Overall rotational transitions of the e - e bands span $\gtrsim 6 cm^{-1}$. On the other hand, the rotational transitions of the a - e type bands of $CF_{3}S$ span $\lesssim 4 cm^{-1}$.

Description

$^{a}$X - Q. Tan M. C. Yang, C. C. Carter, J. M. Williamson, T. A. Miller, T. E. Misna, J. D. O. Anderson and D., D. Desmarteau, J. Phys. Chem. 98, 2732 (1994)
Author Institution: The Ohio State University, Columbus, OH 43210

Keywords

Citation