Spectroscopic observation of (N{sub 2}){sub 2} dimers in free icosahedral N{sub 2} and Ar-N{sub 2} clusters

Journal Article · Mon Aug 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.023201· OSTI ID:22075481

Doronin, Yu S; Libin, M Yu; Samovarov, V N; Vakula, V L ^[1]

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1. B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Avenue, Kharkiv, 61103 (Ukraine)

Supersonic-jet luminescence spectroscopy was applied to study vibronic transitions in icosahedral N{sub 2} and Ar-N{sub 2} clusters having from 100 to 400 particles per cluster. In the case of mixed Ar-N{sub 2} clusters, the w {sup 1}{Delta}{sub u}{yields} X {sup 1}{Sigma}{sub g}{sup +} transitions were observed to occur in single N{sub 2} molecules in an Ar environment, in very much the same way as in Ar-N{sub 2} bulk samples. In N{sub 2} clusters, however, a band series was detected which, to our knowledge, was never observed earlier. In the spectra of Ar-N{sub 2} clusters, this series coexisted with the ''bulk''w {sup 1}{Delta}{sub u}{yields} X{sup 1}{Sigma}{sub g}{sup +} transitions. Our analysis demonstrated that the series should be assigned to emission of van der Waals (N{sub 2}){sub 2} dimers from inside clusters. Earlier, such dimers were only observed in molecular beams and gaseous nitrogen; this paper reports their observation in the solid phase of nitrogen. Our results can be of interest from the viewpoint of producing polymeric nitrogen since (N{sub 2}){sub 2} dimers can be considered to be a starting species for its synthesis.

• OSTI ID: 22075481
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
DIMERS
LUMINESCENCE
MOLECULAR BEAMS
MOLECULES
NITROGEN
SPECTROSCOPY
VAN DER WAALS FORCES