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

  1. Get@NRC: High resolution infrared spectroscopy of carbon dioxide clusters up to (CO 2) 13 (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1063/1.3615543
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Journal titleJournal of Chemical Physics
Article number44315
SubjectAsymmetric 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
AbstractThirteen 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.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Steacie Institute for Molecular Sciences (SIMS-ISSM)
Peer reviewedYes
NPARC number21271330
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Record identifier86540ce8-8bba-4083-9b77-56b6d0579be4
Record created2014-03-24
Record modified2016-05-09
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