Files in this item

FilesDescriptionFormat

application/pdf

application/pdf315253.pdf (14MB)
PresentationPDF

application/pdf

application/pdf859.pdf (18kB)
AbstractPDF

application/vnd.openxmlformats-officedocument.presentationml.presentation

application/vnd.openxmlformats-officedocument.presentationml.presentation315253.pptx (9MB)
PresentationMicrosoft PowerPoint 2007

Description

Title:HIGH RESOLUTION INFRARED SPECTRA OF TRIACETYLENE
Author(s):Doney, Kirstin D
Contributor(s):Linnartz, Harold; Zhao, Dongfeng
Subject(s):Vibrational structure/frequencies
Abstract:Triacetylene, HC$_{6}$H, is the longest poly-acetylene chain found in space, and is believed to be involved in the formation of longer chain molecules and polycyclic aromatic hydrocarbons (PAHs). However, abundances are expected to be low, and observational confirmation requires knowledge of the gas-phase spectra, which up to now has been incomplete with only the weak, low lying bending modes being known. We present new infrared (IR) spectra in the C-H stretch region obtained using ultra-sensitive and highly precise IR continuous wave cavity ring-down spectroscopy (cw-CRDS), combined with supersonic plasma expansionsfootnote{D. Zhao, J. Guss, A. Walsh, H. Linnartz, Chem. Phys. Lett., 565, 132 (2013)}. The talk reviews the accurate determination of the rotational constants of the asymmetric fundamental mode, $nub{5}$, including discussion on the perturber state, and associated hot bandsfootnote{K.D. Doney, D. Zhao, H. Linnartz, in preparation}. The determined molecular parameters are accurate enough to aid astronomical searches with such facilities as ALMA (Atacama Large Millimeter Array) or the upcoming JWST (James Webb Space Telecscope), which can now probe even trace molecules (abundances of $sim$ 10$^{-6}$ - 10$^{-10}$ with respect to H$_{2}$).
Issue Date:25-Jun-15
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:ACS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/79434
Date Available in IDEALS:2016-01-05


This item appears in the following Collection(s)

Item Statistics