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Vibrational spectrum of methanesulfinic acid produced by photooxidation of methanethiol in a solid argon matrix
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DOI：10.1016/j.cplett.2026.142854.png)
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Abstract
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• Weak intermolecular complexes between methanethiol (CH3SH) and oxygen molecule (O2) were trapped in an Ar matrix at 5 K. • CH3SH…O2 complexes readily decompose under the 254-nm photolysis unlike pure CH3SH in the same conditions leading to new photooxidation products. • The variety of photoproducts includes SO2, CO, OCS, HC(O)SH, CH3S(O)OH and many other species as monitored by FTIR spectroscopy. • The IR-spectrum of atmospherically relevant methanesulfinic acid revealing 11 fundamental vibrational frequencies was obtained and characterized for the first time.
Keywords:
methanethiol
oxygen molecule
photooxidation
methanesulfinic acid
FTIR spectroscopy
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3.1
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1.0K
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