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Title:LASER SPECTROSCOPY OF VINYL ALCOHOL EMBEDDED IN HELIUM DROPLETS
Author(s):Bunn, Hayley
Contributor(s):Douberly, Gary E.; Raston, Paul
Subject(s):Vibrational structure/frequencies
Abstract:Vinyl alcohol has two rotameric forms, known as textit{syn}- and textit{anti}-vinyl alcohol, where textit{syn} is the most stable. While both have been investigated by microwavefootnote{M. Rodler, J. Mol. Spec. 114, 23 (1985);S. Saito, Chem. Phys. Lett. 42, 3 (1976)} and far-infraredfootnote{H. Bunn, R. Hudson, A. S. Gentleman, and P. L. Raston, ACS Earth Space Chem. DOI: 10.1021/acsearthspacechem.6b00008 (2017)} spectroscopy, only the textit{syn} rotamer has been investigated by mid-infrared spectroscopyfootnote{D-L Joo, A. J. Merer, D. J. Clouthier, J. Mol. Spec. 197, 68 (1999)}. This is due to the low textit{anti} rotamer population (15%) at room temperature, in addition to the closeness in proximity of the mid-infrared bands between the rotamers; this results in overlapping bands that are dominated by textit{syn}-vinyl alcohol absorptions. In this investigation we increase the textit{anti}-vinyl alcohol population to ~40% by using a high temperature “pyrolysis” source, and eliminate the spectral overlap by recording the spectra at low temperature in helium nanodroplets. We observe a number of bands of both rotamers in the OH, CH, and CO stretching regions that display rotational substructure. A highlight of this work is the observation of a Fermi dyad in the OH stretching region of textit{anti}-vinyl alcohol. Anharmonic frequency calculations suggest that this is due to a near degeneracy of the OH stretching state (nub{1}) with a triple combination involving nub{7}, nub{8}, and nub{9}._x000d_ _x000d_
Issue Date:6/23/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/97187
DOI:10.15278/isms.2017.FC01
Date Available in IDEALS:2017-07-27


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