Infrared spectra, vibrational relaxation, and isotopically selective photodissociation of OCS in Ar(I) and O sub 2 (I) cryogenic solutions

Journal Article · Thu Jul 26 04:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100378a037· OSTI ID:6378431

Zittel, P F; Sedam, M A ^[1]

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1. Aerospace Corp., Los Angeles, CA (USA)

Vibrational band centers of OCS between 500 and 4,200 cm{sup {minus}1} have been determined for {sup 16}O{sup 12}C{sup 32}S and the singly substituted {sup 13}C, {sup 17}O, {sup 18}O, {sup 33}S, and {sup 34}S isotopic analogues in liquid Ar and liquid O{sub 2} solution. Band strengths and band half-widths of the Lorentzian-shaped absorption features were also measured. The narrow spectral width of the absorption bands with respect to the isotopic band center shifts has been exploited in a two-step, infrared/ultraviolet laser photodissociation technique to separate oxygen isotopes with enrichment factors of 3-4. The dependence of the isotopic enrichment factors on experimental conditions provides some information about sulfur atom chemistry and vibrational energy relaxation in the OCS/O{sub 2}/Ar cryogenic liquid system.

• OSTI ID: 6378431
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:15; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ARGON
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
DATA
DATA ANALYSIS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
INFRARED SPECTRA
MEASURING INSTRUMENTS
MEASURING METHODS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN
PHOTOCHEMICAL REACTIONS
RARE GASES
SPECTRA
VIBRATIONAL STATES