Infrared spectra of helium clusters seeded with nitrous oxide, 4HeN-N2O, with N = 1-80

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DOIResolve DOI: http://doi.org/10.1063/1.2756537
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TypeArticle
Journal titleThe Journal Of Chemical Physics
Volume127
Issue4
Pages044315-1044315-10; # of pages: 10
Subjecthelium neutral molecules; infrared spectra; isotope effects; molecular configurations; nitrogen compounds; rotational states; vibrational states
AbstractHigh resolution infrared spectra of HeN�N2O clusters are studied in the 2200 cm?1 region of the N2O nu1 fundamental band. The clusters are produced in a pulsed supersonic jet expansion from a cooled nozzle source and probed using a tunable diode laser operating in a rapid-scan mode. Three isotopic forms are used (14N14N16O, 15N14N16O, and 15N15N16O) in order to support the spectral analyses. For clusters up to N[approximate]24, the individual spectra are resolved, assigned, and analyzed together with complementary microwave data. Assignments for larger clusters are uncertain due to overlapping transitions, but an approximate analysis is still possible for N[approximate]25�80. Compared to helium clusters containing the related CO2 or OCS molecules, the rotational dynamics of HeN�N2O clusters show similarities but also important differences. In particular, HeN�N2O has more irregular behavior in the range of N=6�17, indicating that conventional molecular structure plays a greater role. In general terms, these differences can be attributed to a greater degree of angular anisotropy in the He�N2O intermolecular potential.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12337672
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Record identifier4cc0310c-2cd2-4ac6-97cf-8e944852c584
Record created2009-09-10
Record modified2016-05-09
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