Spectroscopy of OSSO and Other Sulfur Compounds Thought to be Present in the Venus Atmosphere
| Autor: | Joseph R. Lane, Henrik G. Kjaergaard, Sara Farahani, Emil Vogt, Benjamin N. Frandsen |
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| Rok vydání: | 2020 |
| Předmět: |
Sulfur monoxide
Argon 010304 chemical physics biology Analytical chemistry chemistry.chemical_element Infrared spectroscopy Context (language use) Venus 010402 general chemistry biology.organism_classification 01 natural sciences 0104 chemical sciences Atmosphere of Venus Atmosphere chemistry.chemical_compound chemistry 0103 physical sciences Physical and Theoretical Chemistry Spectroscopy |
| Zdroj: | Frandsen, B N, Farahani, S, Vogt, E, Lane, J R & Kjaergaard, H G 2020, ' Spectroscopy of OSSO and Other Sulfur Compounds Thought to be Present in the Venus Atmosphere ', Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment and General Theory, vol. 124, no. 35, pp. 7047-7059 . https://doi.org/10.1021/acs.jpca.0c04388 |
| ISSN: | 1520-5215 1089-5639 |
| Popis: | The spectroscopy of cis-OSSO and trans-OSSO is explored and put into the context of the Venusian atmosphere, along with other sulfur compounds potentially present there, namely, S2O, C1-S2O2, trigonal-S2O2, and S3. UV-vis spectra were calculated using the nuclear ensemble approach. The calculated OSSO spectra are shown to match well with the 320-400 nm near-UV absorption previously measured on Venus, and we discuss the challenges of assigning OSSO as the Venusian near-UV absorber. The largest source of uncertainty is getting accurate concentrations of sulfur monoxide (3SO) in the upper cloud layer of Venus (60-70 km altitude) since the 3SO self-reaction is what causes cis- and trans-OSSO to form. Additionally, we employed the matrix-isolation technique to trap OSSO formed by microwave discharging a gas mixture of argon and SO2 and then depositing the mixture onto a cold window (6-12 K). Anharmonic vibrational transition frequencies and intensities were calculated at the coupled cluster level to corroborate the matrix-isolation FTIR spectra. The computationally calculated UV-vis and experimentally recorded IR spectra presented in this work aid future attempts at detecting these sulfur compounds in the Venusian atmosphere. |
| Databáze: | OpenAIRE |
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