Spectroscopy of OSSO and other sulfur compounds thought to be present in the venus atmosphere

Frandsen, Benjamin N. and Farahani, Sara and Vogt, Emil and Lane, Joseph R. and Kjaergaard, Henrik G. (2020) Spectroscopy of OSSO and other sulfur compounds thought to be present in the venus atmosphere. Journal of physical chemistry A . ISSN 1932-7455

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Official URL: https://pubs.acs.org/doi/abs/10.1021/acs.jpca.0c04...

Abstract or Summary

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 hallenges of assigning OSSO as the Venusian near-UV absorber. The largest source of uncertainty is getting accurate concentrations of sulfur monoxide (3 SO) in the upper cloud layer of Venus (60−70 km altitude) since the 3 SO self-reaction is what causes cis- and transOSSO 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.

Item Type:Journal article
Keywords that describe the item:Kinetic parameters, Absorption Spectrum, Molecular, Spectroscopy, Structure, Chemical calculations, Energy
Subjects:Q Science > QD Chemistry
Divisions:Schools > Centre for Science and Primary Industries
ID Code:7399
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Deposited On:05 Nov 2020 04:57
Last Modified:05 Nov 2020 04:57

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