Isotopologues of the NeHCl complex observed by chirped pulse Fourier transform microwave spectroscopy
The weakly bound Ne·HCl van der Waals dimer is a prototype for studying large-amplitude motion in noncovalently bound systems. We report the microwave spectrum of eight isotopologues of Ne·HCl, five of which have not previously been observed by high-resolution spectroscopy. We examine trends in experimentally derived van der Waals stretching force constants and effective bond lengths that are strongly sensitive to isotopologue-dependent motional averaging along the hindered rotation coordinate. Finally, we report an updated semi-empirical three-dimensional morphed potential for the Ne·HCl dimer that is fitted to a large dataset including previous microwave, near-IR, and sub-millimeter wave data in addition to our new microwave data.
Authors
- Melanie Schnell (ORCID: https://orcid.org/0000-0001-7801-7134)
- Luis A. Rivera−Rivera (ORCID: https://orcid.org/0000-0002-2703-0846)
- Fan Xie (ORCID: https://orcid.org/0000-0002-0353-2059)
- Muhammad Qasim Ali (ORCID: https://orcid.org/0009-0004-5340-3310)
- Surendra Sharma (ORCID: https://orcid.org/0009-0009-6114-6533)
- Arun Bhujel (ORCID: https://orcid.org/0000-0001-8562-0046)
- Salma Akter (ORCID: https://orcid.org/0009-0003-0790-3819)
- G. Barratt Park
Institutions
- Texas Tech University (US)
- Ferris State University (US)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Christian-Albrechts-Universität zu Kiel (DE)
- Max Planck Institute for Biophysical Chemistry (DE)
- Max Planck Institute of Experimental Medicine (DE)
Publication Details
- Journal
- The Journal of Chemical Physics
- Published
- 2026-01-22
- DOI
- https://doi.org/10.1063/5.0308056
- Primary Topic
- Molecular Spectroscopy and Structure
- Type
- article
- Field-Weighted Citation Impact
- 0.00