"New Measurements And Assignments In The V_t = 0, 1, 2 Torsional States Of <span Class=""roman"">cd</span>_{<span Class=""roman"">3</span>}<span Class=""roman"">oh</span> And <span Class=""roman"">ch</span>_{<span Class=""roman"">3</span>}<"

Ilyushin, V.

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https://hdl.handle.net/2142/111234 Copy

Description

Title

"New Measurements And Assignments In The V_t = 0, 1, 2 Torsional States Of cd₃oh And ch₃<"

Author(s)

Ilyushin, V.

Contributor(s)

• Xu, Li-Hong
• Lees, Ronald M.
• Berezkin, K.
• Maul, Christof
• Bauerecker, Sigurd
• Schlemmer, Stephan
• Lewen, Frank
• Müller, Holger S.P.
• Dorovskaya, Olga
• Alekseev, E. A.
• Bakhmat, Yan

Issue Date

2021-06-22

Keyword(s)

Mini-symposium: Large Amplitude Motions

Abstract

"We present\footnote{This work was done under support of the Deutsche Forschungsgemeinschaft and Volkswagen foundation. The assistance of Science and Technology Center in Ukraine is acknowledged (STCU partner project P756).} the results of our new study of the torsion-rotation spectra of the two deuterated isotopologues of methanol: \chem{CD_3OH} and \chem{CH_3OD}. The new microwave measurements were carried out from the millimeter wave range (starting at 34 GHz) to the THz range (up to 1.1 THz) using spectrometers in Kharkiv and K{\""o}ln. The new measurements in the FIR range were carried out in Braunschweig for \chem{CD_3OH} from 20 to 900 \wn. In this work we significantly extend the rotational quantum number coverage for both isotopologues (from $J_{up}$ = 26 [1] to $J_{up}$ = 55 for \chem{CD_3OH} and from $J_{up}$ =21 [2] to $J_{up}$ =40 for \chem{CH_3OD}). The analysis is done using the rho axis method and the RAM36 program code. Our preliminary fits show that for both isotopologs the v$_t$ = 2 torsional state is significantly affected by intervibrational interactions with non-torsional vibrational modes which propagate down through intertorsional interactions. At the same time, for \chem{CD_3OH} we were able to get a fit within experimental error for v$_t$ = 0, 1 states. For \chem{CH_3OD} analysis is in progress now. In the talk the details of this new study will be discussed. [1] A. Predoi-Cross, Li-Hong Xu, M.S. Walsh, R.M. Lees, M. Winnewisser, and H. Lichau J. Mol. Spectrosc.188, 94–101 (1998). [2] Y.-B. Duan, I. Ozier, S. Tsunekawa, and K. Takagi, J. Mol. Spectrosc. 218 (2003) 95–107."

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/111234

DOI

10.15278/isms.2021.TH06

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