Fundamental And Combination Bands Of Co2-c2h2 And Co2-c2d2 In The Mid-infrared Region

Moazzen-Ahmadi, Nasser

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https://hdl.handle.net/2142/50784 Copy

Description

Title

Fundamental And Combination Bands Of Co2-c2h2 And Co2-c2d2 In The Mid-infrared Region

Author(s)

Moazzen-Ahmadi, Nasser

Contributor(s)

• Welbanks, Luis
• George, Jobin
• Rezaei, Mojtaba

Issue Date

2014-06-20

Keyword(s)

Clusters/Complexes

Abstract

Spectra of the weakly-bound CO$_2$-C$_2$H$_2$ and CO$_2$-C$_2$D$_2$ complexes are observed in the regions of CO$_2$ \nub{3} ($\sim$ 2340 cm$^{-1}$) and C$_2$D$_2$ \nub{3} ($\sim$ 2440 cm$^{-1}$) fundamental vibrations, using an infrared Optical Parametric Oscillator (OPO) to probe a pulsed supersonic slit-jet expansion. Five bands are measured and analyzed: the fundamental asymmetric stretch of the C$_2$D$_2$ component, two combination bands involving the out-of-plane torsional vibrations for CO$_2$-C$_2$D$_2$, and two combination bands involving an intermolecular in-plane bending vibration for CO$_2$-C$_2$H$_2$ and CO$_2$-C$_2$D$_2$. The measured intermolecular vibrational frequencies are 61.408(1), 54.5(5), 39.9(5), and 39.961(1) cm$^{-1}$, respectively. Torsional vibrational frequencies are in good agreement with the value of 41 cm$^{-1}$ estimated by Muenter\footnote{J. S. Muenter, J. Chem. Phys. \textbf{90}, 2781 (1991)} using a harmonic oscillator model. The intermolecular vibrations provide clear spectroscopic data against which theory can be benchmarked. These results will be discussed, along with a brief introduction of our pulsed-jet supersonic apparatus which has been retrofitted with an infrared tunable Optical Parametric Oscillator (Lockheed Martin Aculight Argos$^{\text{TM}}$).

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50784

DOI

https://doi.org/10.15278/isms.2014.FB06

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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