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High resolution infrared spectroscopy of carbon dioxide clusters up to (CO 2) 13

Par Conseil national de recherches du Canada

DOITrouver le DOI : https://doi.org/10.1063/1.3615543
AuteurRechercher : ; Rechercher : ; Rechercher : 1; Rechercher :
Affiliation
  1. Conseil national de recherches du Canada. Institut Steacie des sciences moléculaires du CNRC
FormatTexte, Article
Sujetasymmetric top; blueshifts; carrier gas; cluster sizes; cluster structure; dilute mixtures; dipole-dipole interaction model; direct absorption; high resolution infrared spectroscopy; infrared bands; intermolecular potentials; pulsed supersonic jet expansions; rotational constants; stable form; infrared spectroscopy; isomers; supersonic aerodynamics; carbon dioxide
Résumé
Thirteen specific infrared bands in the 2350 cm -1 region are assigned to carbon dioxide clusters, (CO 2) N, with N = 6, 7, 9, 10, 11, 12 and 13. The spectra are observed in direct absorption using a tuneable infrared laser to probe a pulsed supersonic jet expansion of a dilute mixture of CO 2 in He carrier gas. Assignments are aided by cluster structure calculations made using two reliable CO 2 intermolecular potential functions. For (CO 2) 6, two highly symmetric isomers are observed, one with S 6 symmetry (probably the more stable form), and the other with S 4 symmetry. (CO 2) 13 is also symmetric (S 6), but the remaining clusters are asymmetric tops with no symmetry elements. The observed rotational constants tend to be slightly (≈2%) smaller than those from the predicted structures. The bands have increasing vibrational blueshifts with increasing cluster size, similar to those predicted by the resonant dipole-dipole interaction model but significantly larger in magnitude. © 2011 American Institute of Physics.
Date de publication
Dans
  • The Journal of Chemical Physics 135, nº 4, 44315 (2011).
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21271330
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Identificateur de l’enregistrement86540ce8-8bba-4083-9b77-56b6d0579be4
Enregistrement créé2014-03-24
Enregistrement modifié2020-04-21
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