The visible absorption spectrum of 16OBr16O and 18OBr18O isolated in solid Ne

Yu Chang Lee, Yuan-Pern Lee*

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

The visible absorption spectrum of OBrO isolated in solid Ne is recorded in the 15 800-20 500 cm-1 region. Unlike that reported previously for OBrO in solid Ar, the spectrum in solid Ne has sharp zero-phonon lines (ZPL) exhibiting short progressions of bending (ν2′) mode built upon a long progression of symmetric stretching (ν1′) mode. Use of 18O isotopic labeling resolves discrepancies in vibrational assignments proposed previously. Fitting of the wavenumbers of ZPL yields T0 = 15 818.4 ± 0.2, ω1′ = 642.77 ± 0.13, ω2′ = 223.21 ± 0.43, x11′ = -2.85 ± 0.01, x22′ = -1.07 ± 0.13, and x12′ = -2.49 ± 0.04 cm-1 for the C2A2 - X2B1 transition of 16O79Br16O and T0 = 15 832.0 ± 0.2, ω1′ = 612.49 ± 0.12, ω2′ = 214.01 ± 0.39, x11′ = -2.61 ± 0.01, x22′ = -1.28 ± 0.12, and x12′ = -2.63 ± 0.04 cm-1 for 18O79Br18O. A weak line at 16744.3 cm-1 may be assigned as 302 to yield 2ν3 = 925.7 cm-1 for 16O79Br16O. Observed spectral parameters agree well with high-level theoretical predictions by Peterson.

Original languageEnglish
Pages (from-to)6951-6955
Number of pages5
JournalJournal of Physical Chemistry A
Volume104
Issue number30
DOIs
StatePublished - 8 Jul 2000

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