Additional bands of the Ar-D2O intramolecular bending mode observed using a quantum cascade laser

Jacob T. Stewart; Benjamin J. McCall

doi:10.1016/j.jms.2012.11.002

Additional bands of the Ar-D₂O intramolecular bending mode observed using a quantum cascade laser

Jacob T. Stewart, Benjamin J. McCall

Chemistry

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

Abstract

Three new rovibrational bands of Ar-D₂O have been observed in the ν₂ bending region of D₂O using a quantum cascade laser based cavity ringdown spectrometer. In addition, further observations of the Π(1₁₀, ν₂ = 1) ← Σ(1₀₁) band reported by Li et al. (J. Mol. Spectrosc. 272 (2012) 27-31) have been made. All bands were fit by treating the complex using a pseudo-diatomic model which treats the D₂O as a free rotor within the complex. Molecular constants have been obtained using this model and are reported with deviations in the fits ranging from 0.0002 cm^-1 to 0.0005 cm^-1. Two of the newly observed bands are tentatively assigned as the Π(2₀₂, ν₂ = 1) ← Σ(1₁₁) and Π(2₁₁, ν₂ = 1) ← Σ(2₀₂) bands, which have not previously been observed in other spectral regions.

Original language	English (US)
Pages (from-to)	34-38
Number of pages	5
Journal	Journal of Molecular Spectroscopy
Volume	282
Issue number	1
DOIs	https://doi.org/10.1016/j.jms.2012.11.002
State	Published - 2012

Keywords

Quantum cascade laser
Van der Waals complex
Water clusters

ASJC Scopus subject areas

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

Online availability

10.1016/j.jms.2012.11.002

Library availability

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Cite this

@article{73070ecbecea4003af9256a1bff96142,

title = "Additional bands of the Ar-D2O intramolecular bending mode observed using a quantum cascade laser",

abstract = "Three new rovibrational bands of Ar-D2O have been observed in the ν2 bending region of D2O using a quantum cascade laser based cavity ringdown spectrometer. In addition, further observations of the Π(110, ν2 = 1) ← Σ(101) band reported by Li et al. (J. Mol. Spectrosc. 272 (2012) 27-31) have been made. All bands were fit by treating the complex using a pseudo-diatomic model which treats the D2O as a free rotor within the complex. Molecular constants have been obtained using this model and are reported with deviations in the fits ranging from 0.0002 cm-1 to 0.0005 cm-1. Two of the newly observed bands are tentatively assigned as the Π(202, ν2 = 1) ← Σ(111) and Π(211, ν2 = 1) ← Σ(202) bands, which have not previously been observed in other spectral regions.",

keywords = "Quantum cascade laser, Van der Waals complex, Water clusters",

author = "Stewart, {Jacob T.} and McCall, {Benjamin J.}",

note = "Funding Information: The authors thank the group of Professor Claire Gmachl from the Electrical Engineering Department at Princeton University for providing the quantum cascade laser used for the present work. The development of our spectrometer has been supported by the NASA Laboratory Astrophysics Program and a David and Lucile Packard Fellowship . J.T.S. has been supported by a Robert C. and Carolyn J. Springborn Fellowship from the University of Illinois .",

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AU - McCall, Benjamin J.

N1 - Funding Information: The authors thank the group of Professor Claire Gmachl from the Electrical Engineering Department at Princeton University for providing the quantum cascade laser used for the present work. The development of our spectrometer has been supported by the NASA Laboratory Astrophysics Program and a David and Lucile Packard Fellowship . J.T.S. has been supported by a Robert C. and Carolyn J. Springborn Fellowship from the University of Illinois .

PY - 2012

Y1 - 2012

N2 - Three new rovibrational bands of Ar-D2O have been observed in the ν2 bending region of D2O using a quantum cascade laser based cavity ringdown spectrometer. In addition, further observations of the Π(110, ν2 = 1) ← Σ(101) band reported by Li et al. (J. Mol. Spectrosc. 272 (2012) 27-31) have been made. All bands were fit by treating the complex using a pseudo-diatomic model which treats the D2O as a free rotor within the complex. Molecular constants have been obtained using this model and are reported with deviations in the fits ranging from 0.0002 cm-1 to 0.0005 cm-1. Two of the newly observed bands are tentatively assigned as the Π(202, ν2 = 1) ← Σ(111) and Π(211, ν2 = 1) ← Σ(202) bands, which have not previously been observed in other spectral regions.

AB - Three new rovibrational bands of Ar-D2O have been observed in the ν2 bending region of D2O using a quantum cascade laser based cavity ringdown spectrometer. In addition, further observations of the Π(110, ν2 = 1) ← Σ(101) band reported by Li et al. (J. Mol. Spectrosc. 272 (2012) 27-31) have been made. All bands were fit by treating the complex using a pseudo-diatomic model which treats the D2O as a free rotor within the complex. Molecular constants have been obtained using this model and are reported with deviations in the fits ranging from 0.0002 cm-1 to 0.0005 cm-1. Two of the newly observed bands are tentatively assigned as the Π(202, ν2 = 1) ← Σ(111) and Π(211, ν2 = 1) ← Σ(202) bands, which have not previously been observed in other spectral regions.

KW - Quantum cascade laser

KW - Van der Waals complex

KW - Water clusters

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