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MO: Fachverband Molekülphysik
MO 5: Posters 1: Novelties in Molecular Physics
MO 5.19: Poster
Montag, 23. März 2015, 17:00–19:00, C/Foyer
Precise FTIR Study of Ethylene and Its Isotopomers — Oleg N. Ulenikov1, Olga V. Gromova1, Elena S. Bekhtereva1, Karl-Heinz Gericke2, Christof Maul2, and •Sigurd Bauerecker2 — 1Department of General Physics, Tomsk Polytechnic University, Russia — 2Institut für Physikalische und Theoretische Chemie, TU Braunschweig, Germany
Ethylene is one of the most relevant substances in the study of numerous both pure scientific and applied problems of physics, chemistry, and astrophysics. Ethylene plays an important role in structural chemistry. In particular, its C=C bond length has been chosen as a standard in the discussion of molecular structure. The present work is part of a systematic analysis of the spectra of ethylene and its isotopomers. We report recent results of high resolution studies of the 12C2H4, 13C2H4, 12C2H3D, 12C2H2D2-trans, 12C2H2D2-cis, and 12C2H2D2-as ethylene isotopic species. Precise infrared spectra were measured with a FTIR spectrometer Bruker 120HR at different temperatures, pressures and path lengths. Spectra have been recorded in the region of the 1200-6000 cm-1. Transitions in all the recorded spectra have been assigned and further analysis was made in the frame of the model which takes into account numerous resonance interactions in the sets of bands located in the corresponding spectral regions. The obtained sets of spectroscopic parameters allow to use the obtained information both for a further precise analysis of the line strengths and shape of spectral lines of ethylene and its isotopomers, and also for a correct determination of the ethylene intramolecular potential energy surface.