Temperature-reversible equilibria and exchange among trapping sites for SOF/sub 2/ isolated in noble gas matrices
High-resolution IR studies have been made for thionyl fluoride isolated in argon, krypton, and xenon matrices in order to probe matrix-molecule interactions and dynamics. Argon matrices show surprisingly complex site structure with at least five distinct monomer sites, whereas krypton and xenon matrices show two and three dominant trapping sites, respectively. The additional sites observed in argon are attributed to three-atom substitutional cages which are unstable in krypton and xenon matrices. The relative intensities of the various monomer sites in krypton and especially xenon change dramatically and reversibly with temperature, indicating that the inequivalent sites are in equilibrium. In addition, the frequency positions for the various sites merge and the lines broaden as temperature is raised to give single symmetric lines in the high-temperature limit. We attribute the collapse of the site structure at elevated temperatures to a facile exchange among inequivalent sites. 8 figures, 1 table.
- Research Organization:
- Los Alamos National Lab., NM
- OSTI ID:
- 6449859
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 86:18; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ARGON
COMPARATIVE EVALUATIONS
DATA
ELEMENTS
EQUILIBRIUM
EXPERIMENTAL DATA
FLUIDS
FLUORINE COMPOUNDS
GASES
HALOGEN COMPOUNDS
INERT ATMOSPHERE
INFORMATION
INFRARED SPECTRA
KRYPTON
MATRIX ISOLATION
NONMETALS
NUMERICAL DATA
OXYFLUORIDES
OXYGEN COMPOUNDS
RARE GASES
SPECTRA
SULFUR COMPOUNDS
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
XENON