Rovibrational Spectra of Water–Carbon Disulfide Complexes in the Bending Region of Water: Anomalous <i>ortho</i>-to-<i>para</i> Ratio
Rovibrational spectra of D<sub>2</sub>O-CS<sub>2</sub> and HDO-CS<sub>2</sub> van der Waals complexes have been measured in the bending region of D<sub>2</sub>O/HDO by direct absorption in a slit supersonic jet expansion. The H<sub>2</sub>O-CS<sub>2</sub> dimer is reinvestigated in the bending region of H<sub>2</sub>O with a higher rotational temperature compared with the previous study [Barclay, A. J. <i>Phys. Chem. Chem. Phys.</i> 2024, 26, 23053-23061], namely, ∼10 versus ∼2 K. Only the most stable isomer was observed, and precise molecular constants for these three complexes are determined. The HDO-CS<sub>2</sub> complex in the supersonic jet was relaxed into an equilibrated population. But the line intensities for transitions originating from the <i>K</i><sub>a</sub> = 1 levels in the ground state for both D<sub>2</sub>O-CS<sub>2</sub> and H<sub>2</sub>O-CS<sub>2</sub> are found to be significantly stronger than those predicted with normal nuclear spin statistical weights. This abnormality is likely due to the different yielding rates for the <i>para</i>- and <i>ortho</i>- spin species of D<sub>2</sub>O-CS<sub>2</sub> or H<sub>2</sub>O-CS<sub>2</sub> in the supersonic jet expansion.
Authors
- Xiang Li (ORCID: https://orcid.org/0000-0002-5894-3429)
- Yun Liu (ORCID: https://orcid.org/0000-0001-8615-4710)
- Ting Qing (ORCID: https://orcid.org/0000-0002-9398-682X)
- Chuanxi Duan (ORCID: https://orcid.org/0000-0002-3600-4586)
Institutions
- Central China Normal University (CN)
- Nanchang Normal University (CN)
Publication Details
- Journal
- The Journal of Physical Chemistry A
- Published
- 2025-02-26
- DOI
- https://doi.org/10.1021/acs.jpca.5c00087
- Citations
- 1
- Primary Topic
- Molecular Spectroscopy and Structure
- Type
- article
- Field-Weighted Citation Impact
- 0.76