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 Title: LASER SPECTROSCOPY OF OCS-WATER COMPLEXES IN SUPERFLUID HELIUM NANODROPLETS Author(s): Miller, Isaac James Contributor(s): Raston, Paul ; Faulkner, Ty ; Wells, Tyler Subject(s): Mini-symposium: Non-covalent Interactions Abstract: Superfluid helium nanodroplets are particularly useful for synthesizing molecular complexes, and several investigations have focused on investigating the hydration of atmospherically important molecules, such as the hydroxyl radical [1]. While carbonyl sulphide is the most abundant sulphur containing molecule in the atmosphere, little is known experimentally about how it interacts with water. In this study we focus on isolating OCS-(H$_{2}$O)$_{N}$ complexes in helium nanodroplets, and on uncovering their infrared signatures with quantum cascade laser spectroscopy. For the dimer, we identified two isomers, which is consistent with what was observed in solid neon [2]. One of the isomers has C$_{s}$ symmetry with the water near the oxygen end of OCS, and the other has C$_{2v}$ symmetry, with the water at the sulphur end. The latter isomer displays well resolved rotational substructure in its C-O stretching band, and Stark spectroscopy has been performed, which should allow for determination of its dipole moment. Larger clusters seem to build off of the dimers, as evidenced by two sets of infrared bands that grow in with increasing water concentrations, near the corresponding OCS-H$_{2}$O bands. [1] F. J. Hernandez et al. The Journal of Chemical Physics 143, 164304 (2015). [2] P. Soulard et al. The Journal of Chemical Physics 146, 234303 (2017). Issue Date: 2019-06-19 Publisher: International Symposium on Molecular Spectroscopy Genre: Conference Paper / Presentation Type: Text Language: English URI: http://hdl.handle.net/2142/104319 DOI: 10.15278/isms.2019.WH07 Rights Information: Copyright 2019 Isaac James Miller Date Available in IDEALS: 2019-07-152020-01-25
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