Infrared spectra of the NeC₂D₄ and ArC₂D₄ complexes

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/j.jms.2013.05.013
AuthorSearch for: ; Search for: ; Search for: 1; Search for:
Name affiliation
  1. National Research Council of Canada. Security and Disruptive Technologies
FormatText, Article
Journal titleJournal of Molecular Spectroscopy
ISSN0022-2852
Volume289
Pages21–25
Subjectdimer; direct measurement; fundamental bands; hindered internal rotations; infrared spectrum; rotational constants; supersonic jets; tunneling splittings; vibrational shift; argon; ethylene; neon; quantum cascade lasers; spectroscopy; supersonic aerodynamics; van der Waals
Abstract
Spectra of Ne─C₂D₄ and Ar─C₂D₄ are studied in the ν11 fundamental band region of C₂D₄ (≈2200 cm⁻¹) using a tuneable quantum cascade laser to probe a pulsed supersonic slit jet expansion. The spectra are those of perpendicular bands of near-prolate asymmetric rotors, but with a doubling of transitions due to tunneling. These tunneling splittings are due to hindered internal rotation of C₂D₄ around its C─C axis, and are more prominent for Ne─C₂D₄ than for Ar─C₂D₄. The analysis yields the first direct measurement of the A rotational constants for these complexes, and shows that the vibrational shifts are very small (<0.3 cm⁻¹). Attempts to observe the spectrum of He─C₂D₄ were not successful.
Publication date
PublisherElsevier
Elsevier
LanguageEnglish
Peer reviewedYes
IdentifierS0022285213000854
NPARC number23000548
Export citationExport as RIS
Report a correctionReport a correction
Record identifier4c4013d8-bc29-4e8b-bc55-fddbbcfd7964
Record created2016-07-29
Record modified2020-09-08
Report a problem on this page
Date modified: