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Title: Observation of b2 symmetry vibrational levels of the SO2C 1B2 state: Vibrational level staggering, Coriolis interactions, and rotation-vibration constants

Abstract

The $$\tilde{C}$$ 1B2 state of SO2 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 (b2 vibrational symmetry) have not previously been observed because transitions into these levels from the zero-point level of the $$\tilde{X}$$ state are vibronically forbidden. We use IR-UV double resonance to observe the b2 vibrational levels of the $$\tilde{C}$$ state below 1600 cm-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 a1 and b2 vibrational symmetry and to determine accurately the vibrational dependence of the rotational constants in the distorted $$\tilde{C}$$ electronic state.

Authors:
ORCiD logo [1];  [1];  [1]; ORCiD logo [1]
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  1. Massachusetts Institute of Technology, Cambridge, MA (United States). Dept. of Chemistry
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1248484
Alternate Identifier(s):
OSTI ID: 1247601; OSTI ID: 1733330; OSTI ID: 1831804
Grant/Contract Number:  
FG02-87ER13671
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 144; Journal Issue: 14; Journal ID: ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; SO2; sulfur dioxide; pseudo Jahn-Teller; vibronic coupling; Coriolis effects; rotation constants; wave functions; level splitting; ultraviolet light

Citation Formats

Park, G. Barratt, Jiang, Jun, Saladrigas, Catherine A., and Field, Robert W. Observation of b2 symmetry vibrational levels of the SO2C 1B2 state: Vibrational level staggering, Coriolis interactions, and rotation-vibration constants. United States: N. p., 2016. Web. doi:10.1063/1.4944924.
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Park, G. Barratt, Jiang, Jun, Saladrigas, Catherine A., & Field, Robert W. Observation of b2 symmetry vibrational levels of the SO2C 1B2 state: Vibrational level staggering, Coriolis interactions, and rotation-vibration constants. United States. https://doi.org/10.1063/1.4944924
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Park, G. Barratt, Jiang, Jun, Saladrigas, Catherine A., and Field, Robert W. Thu . "Observation of b2 symmetry vibrational levels of the SO2C 1B2 state: Vibrational level staggering, Coriolis interactions, and rotation-vibration constants". United States. https://doi.org/10.1063/1.4944924. https://www.osti.gov/servlets/purl/1248484.
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@article{osti_1248484,
title = {Observation of b2 symmetry vibrational levels of the SO2C 1B2 state: Vibrational level staggering, Coriolis interactions, and rotation-vibration constants},
author = {Park, G. Barratt and Jiang, Jun and Saladrigas, Catherine A. and Field, Robert W.},
abstractNote = {The $\tilde{C}$ 1B2 state of SO2 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 (b2 vibrational symmetry) have not previously been observed because transitions into these levels from the zero-point level of the $\tilde{X}$ state are vibronically forbidden. We use IR-UV double resonance to observe the b2 vibrational levels of the $\tilde{C}$ state below 1600 cm-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 a1 and b2 vibrational symmetry and to determine accurately the vibrational dependence of the rotational constants in the distorted $\tilde{C}$ electronic state.},
doi = {10.1063/1.4944924},
journal = {Journal of Chemical Physics},
number = 14,
volume = 144,
place = {United States},
year = {Thu Apr 14 00:00:00 EDT 2016},
month = {Thu Apr 14 00:00:00 EDT 2016}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1063/1.4944924
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Cited by: 11 works
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