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 Title: High-resolution Infrared Spectrum Of The Ν3+ν8 Combination Band Of Jet-cooled Propyne Author(s): Zhao, Dongfeng Contributor(s): Linnartz, Harold Subject(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. Issue Date: 2014-06-20 Publisher: International Symposium on Molecular Spectroscopy Citation Info: Zhao, D.; Linnartz, H. HIGH-RESOLUTION INFRARED SPECTRUM OF THE ν3+ν8 COMBINATION BAND OF JET-COOLED PROPYNE. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.FE09 Genre: CONFERENCE PAPER/PRESENTATION Type: Text Language: English URI: http://hdl.handle.net/2142/50971 DOI: https://doi.org/10.15278/isms.2014.FE09 Rights Information: Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/ Date Available in IDEALS: 2014-09-172015-04-14
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