High-resolution Infrared Spectrum Of The Ν3+ν8 Combination Band Of Jet-cooled Propyne

Zhao, Dongfeng

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https://hdl.handle.net/2142/50971 Copy

Description

Title

High-resolution Infrared Spectrum Of The Ν3+ν8 Combination Band Of Jet-cooled Propyne

Author(s)

Zhao, Dongfeng

Contributor(s)

Linnartz, Harold

Issue Date

2014-06-20

Keyword(s)

Planetary atmospheres

Abstract

Propyne (CH$_{3}$-C$\equiv$CH) is an important molecule in astrophysics and planetary atmospheres, and an important constituent of fuels. Spectroscopic investigation of propyne is also of fundamental interest in intramolecular vibrational redistribution (IVR) dynamics of hydrocarbons. Although extensive spectroscopic studies on this simple organic molecule have been performed, the $\nu_3$+$\nu_8$ band has not been reported before. In this presentation, the high-resolution infrared spectrum of the $\nu_3$+$\nu_8$ combination band of propyne is presented.\footnote{D. Zhao, H. Linnartz, Chem. Phys. Lett. (2014), DOI: 10.1016/j.cplett.2014.02.016.} Continuous-wave cavity ring-down spectroscopy is used to measure this weak infrared band in the 3175 $cm^{-1}$ region using a supersonic free jet. The rotational analysis of the experimental spectrum results in accurate spectroscopic parameters for the $\nu_3$+$\nu_8$ combination vibrational state. Severe perturbations are found for \textit{K} = 3 and 4 rotational levels, and are likely due to near-resonant or non-resonant interactions between the $\nu_3$+$\nu_8$ and other vibrational states. Moreover, three parallel-transition type subbands are observed and their analysis is presented as well.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50971

DOI

https://doi.org/10.15278/isms.2014.FE09

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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