Multiple trapping sites and symmetry splitting in cryogenic matrices: Infrared spectroscopy of HCN in Ar, Kr, and Xe

Article abstract of DOI:10.1063/1.448446

Infrared spectra of HC(14)N and HC(15)N trapped in cryogenic matrices of Ar, Kr, and Xe and of DCN in Xe have been measured.In addition to the fundamental frequencies, overtone and combination bands along with their anharmonic constants are reported.In the Kr and Xe matrices several of the bands exhibit multiple peaks.Changes in the bands with temperature, concentration, annealing, and host indicate that there are two trapping sites.In Xe the degeneracy of the C-H bend ν₂ is split in one site.The spectral data in Xe may be understood in terms of HCN in a substitutional site of the face-centered-cubic rare gas lattice with some molecules oriented along the <111> axis and others along the <110> axis.Yhe low symmetry about the <110> axis removes the degeneracy between the two bending coordinates of an HCN oriented along it.Two sites occur in Kr.Although a splitting of the ν₂ degeneracy is not resolved, the same sites are probably involved in both Kr and Xe.A single unsplit site is observed for Ar.

Full text of DOI:10.1063/1.448446

Multiple trapping sites and symmetry splitting in cryogenic matrices: Infrared
spectroscopy of HCN in Ar, Kr, and Xe
Alison D. Abbate and C. Bradley Moore
Citation: The Journal of Chemical Physics 82, 1255 (1985); doi: 10.1063/1.448446
View online: http://dx.doi.org/10.1063/1.448446
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/82/3?ver=pdfcov
Published by the AIP Publishing
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132.236.27.111 On: Thu, 18 Dec 2014 09:12:35

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.236.27.111 On: Thu, 18 Dec 2014 09:12:35

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.236.27.111 On: Thu, 18 Dec 2014 09:12:35

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.236.27.111 On: Thu, 18 Dec 2014 09:12:35

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.236.27.111 On: Thu, 18 Dec 2014 09:12:35

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.236.27.111 On: Thu, 18 Dec 2014 09:12:35

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
132.236.27.111 On: Thu, 18 Dec 2014 09:12:35