Parallel bands of cyclopropane in the 3.2-μm region

J. Plíva, Daniel Ward Merdes, A. S. Pine

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The extremely perturbed parallel band system occurring in the infrared spectrum of cyclopropane between ∼3060 and 3150 cm-1 has been recorded with effective resolution of less than one-half of the Doppler width using a difference-frequency laser spectrometer and subsequent deconvolution. The region of the strong Q branches near 3101 cm-1 has also been measured with a color center laser and optothermal detection in a molecular beam adiabatically cooled to ∼10 K. Three distinct sequences of parallel subbands are observed belonging to the antisymmetric CH stretching vibration ν6 of species A″2 in anharmonic plus Jz-type Coriolis resonances with two perturbing states identified as the A″2 A″1 components of the combinations ν2 + ν11 + ν14± and 2ν13 + ν14±. A five-level Hamiltonian model has been used to interpret the observed spectrum and to adjust spectroscopic constants for the states involved and for their interactions. Additional local perturbations are observed in the spectrum.

Original languageEnglish (US)
Pages (from-to)133-144
Number of pages12
JournalJournal of molecular spectroscopy
Volume153
Issue number1-2
DOIs
StatePublished - Jan 1 1992

Fingerprint

cyclopropane
Hamiltonians
Color centers
laser spectrometers
Molecular beams
Lasers
Deconvolution
color centers
molecular beams
Stretching
Spectrometers
infrared spectra
methylidyne
Infrared radiation
perturbation
vibration
lasers
interactions

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry

Cite this

Plíva, J. ; Merdes, Daniel Ward ; Pine, A. S. / Parallel bands of cyclopropane in the 3.2-μm region. In: Journal of molecular spectroscopy. 1992 ; Vol. 153, No. 1-2. pp. 133-144.
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Parallel bands of cyclopropane in the 3.2-μm region. / Plíva, J.; Merdes, Daniel Ward; Pine, A. S.

In: Journal of molecular spectroscopy, Vol. 153, No. 1-2, 01.01.1992, p. 133-144.

Research output: Contribution to journalArticle

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AU - Plíva, J.

AU - Merdes, Daniel Ward

AU - Pine, A. S.

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AB - The extremely perturbed parallel band system occurring in the infrared spectrum of cyclopropane between ∼3060 and 3150 cm-1 has been recorded with effective resolution of less than one-half of the Doppler width using a difference-frequency laser spectrometer and subsequent deconvolution. The region of the strong Q branches near 3101 cm-1 has also been measured with a color center laser and optothermal detection in a molecular beam adiabatically cooled to ∼10 K. Three distinct sequences of parallel subbands are observed belonging to the antisymmetric CH stretching vibration ν6 of species A″2 in anharmonic plus Jz-type Coriolis resonances with two perturbing states identified as the A″2 A″1 components of the combinations ν2 + ν11⊣ + ν14± and 2ν132± + ν14±. A five-level Hamiltonian model has been used to interpret the observed spectrum and to adjust spectroscopic constants for the states involved and for their interactions. Additional local perturbations are observed in the spectrum.

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