A1 Journal article (refereed)
Anharmonic Vibrational Spectrum and Experimental Matrix Isolation Study of Thioformic Acid Conformers : Potential Candidates for Molecular Cloud and Solar System Observations? (2021)
Lignell, A., Osadchuk, I., Räsänen, M., & Lundell, J. (2021). Anharmonic Vibrational Spectrum and Experimental Matrix Isolation Study of Thioformic Acid Conformers : Potential Candidates for Molecular Cloud and Solar System Observations?. Astrophysical Journal, 917(2), Article 68. https://doi.org/10.3847/1538-4357/ac06d0
JYU authors or editors
Publication details
All authors or editors: Lignell, Antti; Osadchuk, Irina; Räsänen, Markku; Lundell, Jan
Journal or series: Astrophysical Journal
ISSN: 0004-637X
eISSN: 1538-4357
Publication year: 2021
Publication date: 01/08/2021
Volume: 917
Issue number: 2
Article number: 68
Publisher: American Astronomical Society; Institute of Physics Publishing
Publication country: United Kingdom
Publication language: English
DOI: https://doi.org/10.3847/1538-4357/ac06d0
Publication open access: Not open
Publication channel open access:
Abstract
Thioformic acid (TFA) is the sulfur analog of formic acid, the simplest organic acid. It has three analogs, HCOSH, HCSOH, and HCSSH, each of them having two rotational isomeric (rotameric) forms: trans and cis where the trans form is energetically more stable. In this article, we study computational energetics and anharmonic vibrational spectrum of TFA, including overtone and combination vibrations. We also studied experimental photoisomerization and photodecomposition channels of HCOSH molecules with different wavelengths. We suggest that TFA is a potential sulfur-containing candidate molecule for interstellar and planetary observations and discuss these in light of different radiation environments in space. More generally, we discuss that infrared radiation-driven photoisomerization reactions may be a common phenomenon in such environments and can affect the chemical reaction pathways of organic and other interstellar molecules.
Keywords: sulphur compounds; spectrum analysis; astrochemistry; molecular clouds
Free keywords: molecular clouds; molecular spectroscopy; astrochemistry
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2021
JUFO rating: 1
