High-resolution spectroscopy of the ν6 and ν8 bands of formic acid

R. E. Bumgarner; Jong In Choe; S. G. Kukolich; R. J. Butcher

doi:10.1016/0022-2852(88)90073-2

High-resolution spectroscopy of the ν₆ and ν₈ bands of formic acid

R. E. Bumgarner, Jong In Choe, S. G. Kukolich, R. J. Butcher

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The ν₆ and ν₈ bands of formic acid at 1104.8 and 1033.5 cm^-1 were observed at 0.01 cm^-1 resolution using the Kitt Peak Fourier-transform spectrometer. The ν₈ Q branch was observed at 0.001 cm^-1 resolution using a diode laser source. These data, together with previous laser saturation, and far-IR and microwave data have been fit with a Watson A-reduced Hamiltonian to determine excited state constants. The A-type Coriolis term was included in the fit and the total Hamiltonian was diagonalized. The new data and fit improve the accuracies of the molecular constants and allow several previously undetermined hextic distortion constants in ν₈ to be obtained. We have assigned several previously unassigned far-IR laser transitions occurring between rotational levels in vibrationally excited formic acid states. The new set of constants should allow accurate assignment and prediction of other formic acid far-IR laser transitions.

Original language	English (US)
Pages (from-to)	261-276
Number of pages	16
Journal	Journal of Molecular Spectroscopy
Volume	132
Issue number	1
DOIs	https://doi.org/10.1016/0022-2852(88)90073-2
State	Published - Nov 1988

ASJC Scopus subject areas

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

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10.1016/0022-2852(88)90073-2

Cite this

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title = "High-resolution spectroscopy of the ν6 and ν8 bands of formic acid",

abstract = "The ν6 and ν8 bands of formic acid at 1104.8 and 1033.5 cm-1 were observed at 0.01 cm-1 resolution using the Kitt Peak Fourier-transform spectrometer. The ν8 Q branch was observed at 0.001 cm-1 resolution using a diode laser source. These data, together with previous laser saturation, and far-IR and microwave data have been fit with a Watson A-reduced Hamiltonian to determine excited state constants. The A-type Coriolis term was included in the fit and the total Hamiltonian was diagonalized. The new data and fit improve the accuracies of the molecular constants and allow several previously undetermined hextic distortion constants in ν8 to be obtained. We have assigned several previously unassigned far-IR laser transitions occurring between rotational levels in vibrationally excited formic acid states. The new set of constants should allow accurate assignment and prediction of other formic acid far-IR laser transitions.",

author = "Bumgarner, {R. E.} and Choe, {Jong In} and Kukolich, {S. G.} and Butcher, {R. J.}",

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T1 - High-resolution spectroscopy of the ν6 and ν8 bands of formic acid

AU - Bumgarner, R. E.

AU - Choe, Jong In

AU - Kukolich, S. G.

AU - Butcher, R. J.

PY - 1988/11

Y1 - 1988/11

N2 - The ν6 and ν8 bands of formic acid at 1104.8 and 1033.5 cm-1 were observed at 0.01 cm-1 resolution using the Kitt Peak Fourier-transform spectrometer. The ν8 Q branch was observed at 0.001 cm-1 resolution using a diode laser source. These data, together with previous laser saturation, and far-IR and microwave data have been fit with a Watson A-reduced Hamiltonian to determine excited state constants. The A-type Coriolis term was included in the fit and the total Hamiltonian was diagonalized. The new data and fit improve the accuracies of the molecular constants and allow several previously undetermined hextic distortion constants in ν8 to be obtained. We have assigned several previously unassigned far-IR laser transitions occurring between rotational levels in vibrationally excited formic acid states. The new set of constants should allow accurate assignment and prediction of other formic acid far-IR laser transitions.

AB - The ν6 and ν8 bands of formic acid at 1104.8 and 1033.5 cm-1 were observed at 0.01 cm-1 resolution using the Kitt Peak Fourier-transform spectrometer. The ν8 Q branch was observed at 0.001 cm-1 resolution using a diode laser source. These data, together with previous laser saturation, and far-IR and microwave data have been fit with a Watson A-reduced Hamiltonian to determine excited state constants. The A-type Coriolis term was included in the fit and the total Hamiltonian was diagonalized. The new data and fit improve the accuracies of the molecular constants and allow several previously undetermined hextic distortion constants in ν8 to be obtained. We have assigned several previously unassigned far-IR laser transitions occurring between rotational levels in vibrationally excited formic acid states. The new set of constants should allow accurate assignment and prediction of other formic acid far-IR laser transitions.

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High-resolution spectroscopy of the ν₆ and ν₈ bands of formic acid

Abstract

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