Helium Nanodroplet Infrared Spectroscopic Studies of CH<sub>4</sub><sup>+</sup> and <sup>13</sup>CH<sub>3</sub><sup>+</sup>
In this work, CH<sub>4</sub><sup>+</sup> cations were formed in helium droplets and investigated with infrared laser spectroscopy. The observed infrared bands are assigned to the C<sub>2v</sub> isomer of the CH<sub>4</sub><sup>+</sup> cation. The rotational structure of the bands remains unresolved, indicating a factor of 3 or larger decrease in the rotational constants in helium nanodroplets. We also report on the observation of the spectrum of isotopically substituted <sup>13</sup>CH<sub>3</sub><sup>+</sup> cations in He droplets, which shows a well-resolved rotational structure. The rotational constant A for rotation about the C<sub>3</sub> axis of CH<sub>3</sub><sup>+</sup> in helium was found to be a factor of 1.17 smaller than in the gas phase.
Authors
- Andrey F. Vilesov (ORCID: https://orcid.org/0000-0002-8412-817X)
- Amandeep Singh (ORCID: https://orcid.org/0000-0003-1568-2043)
- Andrew Abishek A. Azhagesan (ORCID: https://orcid.org/0009-0004-2251-1749)
- S Allison
Institutions
- University of Southern California (US)
- Mount St. Mary's University (US)
Publication Details
- Journal
- The Journal of Physical Chemistry A
- Published
- 2024-12-04
- DOI
- https://doi.org/10.1021/acs.jpca.4c06858
- Citations
- 3
- Primary Topic
- Quantum, superfluid, helium dynamics
- Type
- article
- Field-Weighted Citation Impact
- 1.01
Funders
- Division of Chemistry