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MO: Fachverband Molekülphysik
MO 18: Biomolecules
MO 18.2: Vortrag
Donnerstag, 26. März 2015, 11:30–11:45, PH/SR106
Structure Determination of trans-Cinnamaldehyde using Broadband Microwave Spectroscopy — •Sabrina Zinn1,2,3, Thoms Betz1,2,3, and Melanie Schnell1,2,3 — 1Max Planck Institute for the Structure and Dynamics of Matter, Hamburg/Germany — 2Center for Free-Electron Laser Science, Hamburg/Germany — 3The Hamburg Centre for Ultrafast Imaging, Hamburg/Germany
The high-resolution rotational spectrum of gas-phase trans-cinnamaldehyde ((2E)-3-phenylprop-2-enal) has been obtained with chirped-pulse microwave spectroscopy in the frequency range of 2 - 8.5 GHz. The odorant molecule is the essential component in cinnamon oil and causes the characteristic smell. Studying the structure of odorant molecules to learn more about the structure-odor relationship can give insights into molecular recognition by olfactory receptors.
We were able to assign the rotational spectra of trans-cinnamaldehyde as well as all single substituted 13C-species of the molecule. The change in mass, caused by carbon atom substitution in natural abundance, leads to a change of the molecular moments of inertia and thus of the rotational constants. From these additionally obtained parameters, the molecular structure can be determined by using for example Kraitchman’s equations. The obtained structure can be used for a comparison to the structures of other odorant molecules.