Weakly bound CO2-Rg2 trimers are studied by high-resolution (0.002 cm−1) infrared spectroscopy in the region of the CO2 ν3 fundamental band (≈2350 cm−1), using a tunable optical parametric oscillator to probe a pulsed supersonic slit jet expansion with an effective rotational temperature of about 2 K. CO2–Ar2 spectra have been reported previously, but they are extended here to include Rg = Ne, Kr, and Xe as well as new combination and hot bands. For Kr and Xe, a unified scaled parameter scheme is used to account for the many possible isotopic species. Vibrational shifts of CO2-Rg2 trimers are compared to those of CO2-Rg dimers, and in all cases the trimer shifts are slightly more positive (blue-shifted) than expected on the basis of linear extrapolation from the dimer. Combination bands directly measure an intermolecular vibrational mode (the CO2 rock) and give values of about 32.2, 33.8, and 34.7 cm−1 for CO2–Ar2, –Kr2, and –Xe2. Structural parameters derived for CO2-Rg2 trimers are compared with those of CO2-Rg and Rg2 dimers. Spectra of the mixed trimers CO2-Rg-He are also reported.
Skip Nav Destination
,
,
Article navigation
28 November 2022
Research Article|
November 22 2022
Spectra of CO2-Rg2 and CO2-Rg-He trimers (Rg = Ne, Ar, Kr, and Xe): Intermolecular CO2 rock, vibrational shifts and three-body effects Available to Purchase
A. J. Barclay;
A. J. Barclay
(Data curation, Investigation, Validation)
1
Department of Physics and Astronomy, University of Calgary
, 2500 University Drive North West, Calgary, Alberta T2N 1N4, Canada
Search for other works by this author on:
A. R. W. McKellar
;
A. R. W. McKellar
(Formal analysis, Validation, Writing – original draft, Writing – review & editing)
2
National Research Council of Canada
, Ottawa, Ontario K1A 0R6, Canada
Search for other works by this author on:
N. Moazzen-Ahmadi
N. Moazzen-Ahmadi
a)
(Conceptualization, Funding acquisition, Project administration, Supervision, Validation, Writing – review & editing)
1
Department of Physics and Astronomy, University of Calgary
, 2500 University Drive North West, Calgary, Alberta T2N 1N4, Canada
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
A. J. Barclay
1
A. R. W. McKellar
2
N. Moazzen-Ahmadi
1,a)
1
Department of Physics and Astronomy, University of Calgary
, 2500 University Drive North West, Calgary, Alberta T2N 1N4, Canada
2
National Research Council of Canada
, Ottawa, Ontario K1A 0R6, Canada
a)Author to whom correspondence should be addressed: [email protected]
J. Chem. Phys. 157, 204303 (2022)
Article history
Received:
September 26 2022
Accepted:
October 31 2022
Citation
A. J. Barclay, A. R. W. McKellar, N. Moazzen-Ahmadi; Spectra of CO2-Rg2 and CO2-Rg-He trimers (Rg = Ne, Ar, Kr, and Xe): Intermolecular CO2 rock, vibrational shifts and three-body effects. J. Chem. Phys. 28 November 2022; 157 (20): 204303. https://doi.org/10.1063/5.0128133
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
CREST—A program for the exploration of low-energy molecular chemical space
Philipp Pracht, Stefan Grimme, et al.
DeePMD-kit v2: A software package for deep potential models
Jinzhe Zeng, Duo Zhang, et al.
Related Content
Doped rare gas clusters up to completion of first solvation shell, CO2–(Rg)n, n = 3–17, Rg = Ar, Kr, Xe
J. Chem. Phys. (March 2023)
From light-scattering measurements to polarizability derivatives in vibrational Raman spectroscopy: The 2ν5 overtone of SF6
J. Chem. Phys. (May 2013)
Bound-state energies in argon trimers via a variational expansion: The effects from many-body corrections
J. Chem. Phys. (April 2005)