University of Illinois Urbana-Champaign

ROTATIONAL SPECTRUM OF THE METHYL SALICYLATE-WATER COMPLEX: THE MISSING CONFORMER AND THE TUNNELING MOTIONS

Jﾊger, Wolfgang

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459851.pptx

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https://hdl.handle.net/2142/79330

Description

Title
ROTATIONAL SPECTRUM OF THE METHYL SALICYLATE-WATER COMPLEX: THE MISSING CONFORMER AND THE TUNNELING MOTIONS
Author(s)
Jﾊger, Wolfgang
Contributor(s)
  • Xu, Yunjie
  • Thomas, Javix
  • Ghosh, Supriya
Issue Date
23-Jun-15
Keyword(s)
Conformers, isomers, chirality, stereochemistry
Date of Ingest
2016-01-05T20:01:44Z
Abstract
Methyl salicylate is a naturally occurring organic ester produced by wintergreen and other plants. It is also found in many over-the-counter remedies, such as muscle ache creams. The rotational spectrum of the methyl salicylate monomer was reported previously, where the most stable, dominant conformer was identified.footnote{ S. Melandri, B. M. Giuliano, A. Maris, L. B. Favero, P. Ottaviani, B. Velino, W. Caminati, J. Phys. Chem. A. 2007, 111, 9076.} The methyl salicylate-water complex was first studied using fluorescence-detected infrared spectroscopy; only one monohydrate conformer was found in that work.footnote{ A. Mitsuzuka, A. Fujii, T. Ebata, N. Mikami, J. Phys. Chem. A 1998, 102, 9779.} In the present study, we employed both broadband chirped and cavity based Fourier transform microwave spectroscopy to examine the competition between intra- and intermolecular hydrogen-bonding interactions and possible large amplitude motions associated with the methyl group and the water subunit. In contrast to the previous infrared study, two monohydrate conformers were identified, with carbonyl O or hydroxyl O as the hydrogen bond acceptors. Detailed analyses of the observed hyperfine structures will be presented, as well as our efforts to extend the study to larger methyl salicylate hydration clusters.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
English
Permalink
http://hdl.handle.net/2142/79330

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Abstracts & Presentations - 2015 International Symposium on Molecular Spectroscopy PRIMARY