Velocity modulation diode laser spectroscopy of negative ions: The v 1, v1+v2-v2, v1+v 3-v3 bands of thiocyanate (NCS-)

Mark Polak; Martin Gruebele; Richard J. Saykally

doi:10.1063/1.453030

Velocity modulation diode laser spectroscopy of negative ions: The v ₁, v₁+v₂-v₂, v₁+v ₃-v₃ bands of thiocyanate (NCS^-)

Mark Polak, Martin Gruebele, Richard J. Saykally

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

Abstract

149 transitions in the v₁ band (CN stretch) and the corresponding bending and stretching hot bands of thiocyanate (NCS^-) have been measured using velocity modulation spectroscopy with a tunable diode laser. The data were fit to an effective rotation-vibration Hamiltonian, yielding spectroscopic parameters for the (000), (100), (010), (110), (001), and (101) vibrational states. The band origin is v₁=2065.9312(13) cm^-1 and the equilibrium rotational constant is calculated to be 0.197 438(61 ) cm^-1. NCS^- was prepared in a NH ₃/CS₂ discharge, and unlike the recently studied case of NCO^-, vibrational excitation in excess of the rotational temperature (650±200 K) was not observed.

Original language	English (US)
Pages (from-to)	3352-3356
Number of pages	5
Journal	The Journal of Chemical Physics
Volume	87
Issue number	6
DOIs	https://doi.org/10.1063/1.453030
State	Published - Jan 1 1987
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1063/1.453030

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title = "Velocity modulation diode laser spectroscopy of negative ions: The v 1, v1+v2-v2, v1+v 3-v3 bands of thiocyanate (NCS-)",

abstract = "149 transitions in the v1 band (CN stretch) and the corresponding bending and stretching hot bands of thiocyanate (NCS-) have been measured using velocity modulation spectroscopy with a tunable diode laser. The data were fit to an effective rotation-vibration Hamiltonian, yielding spectroscopic parameters for the (000), (100), (010), (110), (001), and (101) vibrational states. The band origin is v1=2065.9312(13) cm-1 and the equilibrium rotational constant is calculated to be 0.197 438(61 ) cm-1. NCS- was prepared in a NH 3/CS2 discharge, and unlike the recently studied case of NCO-, vibrational excitation in excess of the rotational temperature (650±200 K) was not observed.",

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T1 - Velocity modulation diode laser spectroscopy of negative ions

T2 - The v 1, v1+v2-v2, v1+v 3-v3 bands of thiocyanate (NCS-)

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AU - Gruebele, Martin

AU - Saykally, Richard J.

PY - 1987/1/1

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N2 - 149 transitions in the v1 band (CN stretch) and the corresponding bending and stretching hot bands of thiocyanate (NCS-) have been measured using velocity modulation spectroscopy with a tunable diode laser. The data were fit to an effective rotation-vibration Hamiltonian, yielding spectroscopic parameters for the (000), (100), (010), (110), (001), and (101) vibrational states. The band origin is v1=2065.9312(13) cm-1 and the equilibrium rotational constant is calculated to be 0.197 438(61 ) cm-1. NCS- was prepared in a NH 3/CS2 discharge, and unlike the recently studied case of NCO-, vibrational excitation in excess of the rotational temperature (650±200 K) was not observed.

AB - 149 transitions in the v1 band (CN stretch) and the corresponding bending and stretching hot bands of thiocyanate (NCS-) have been measured using velocity modulation spectroscopy with a tunable diode laser. The data were fit to an effective rotation-vibration Hamiltonian, yielding spectroscopic parameters for the (000), (100), (010), (110), (001), and (101) vibrational states. The band origin is v1=2065.9312(13) cm-1 and the equilibrium rotational constant is calculated to be 0.197 438(61 ) cm-1. NCS- was prepared in a NH 3/CS2 discharge, and unlike the recently studied case of NCO-, vibrational excitation in excess of the rotational temperature (650±200 K) was not observed.

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