Observation of b[subscript 2] symmetry vibrational levels of the SO[subscript 2] [~ over C] [superscript 1]B[subscript 2] state: Vibrational level staggering, Coriolis interactions, and rotation-vibration constants
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Field_Observation of b2.pdf
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Author(s)
Park III, George Barratt
Jiang, Jun
Saladrigas, Catherine A.
Field, Robert W
Alternative Title
Observation of b2 symmetry vibrational levels of the SO2 C̃ 1B2 state: Vibrational level staggering, Coriolis interactions, and rotation-vibration constants
Date Issued
April 2016
Journal
The Journal of Chemical Physics
Publisher
American Institute of Physics (AIP)
Citation
Park, G. Barratt et al. “Observation of B 2 Symmetry Vibrational Levels of the SO 2 [~ over C] 1 B 2 State: Vibrational Level Staggering, Coriolis Interactions, and Rotation-Vibration Constants.” The Journal of Chemical Physics 144.14 (2016): 144311.
Version
Author's final manuscript
Abstract
The [~ over C] [superscript 1]B[subscript 2] state of SO[subscript 2] has a double-minimum potential in the antisymmetric stretch coordinate, such that the minimum energy geometry has nonequivalent SO bond lengths. However, low-lying levels with odd quanta of antisymmetric stretch (b[subscript 2] vibrational symmetry) have not previously been observed because transitions into these levels from the zero-point level of the [~ over X] state are vibronically forbidden. We use IR-UV double resonance to observe the b[subscript 2] vibrational levels of the [~ over C] state below 1600 cm[superscript −1] of vibrational excitation. This enables a direct characterization of the vibrational level staggering that results from the double-minimum potential. In addition, it allows us to deperturb the strong c-axis Coriolis interactions between levels of a[subscript 1] and b[subscript 2] vibrational symmetry, and to determine accurately the vibrational dependence of the rotational constants in the distorted [~ over C] electronic state.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1063/1.4944924
