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Title:THE JET-COOLED HIGH-RESOLUTION FAR-IR SPECTRUM OF FORMIC ACID CYCLIC DIMER
Author(s):Huet, Therese R.
Contributor(s):Georges, Robert; Asselin, Pierre; Soulard, Pascale; Pirali, Olivier; Goubet, Manuel; Bteich, Sabath
Subject(s):Mini-symposium: Far-Infrared Spectroscopy
Abstract:The cyclic conformation of the formic acid dimer \chem{(HCOOH)_2} (FACD) is an elementary system under study to understand the concerted hydrogen transfer through equivalent hydrogen bonds. To this end, high-resolution molecular spectroscopy coupled to quantum chemical calculations is a powerful technique. So far molecular parameters have been reported for the ground state, the \nub{22}, \nub{21} and \nub{12}+\nub{14} vibrational levels, from spectra recorded using laser-based techniques in the 7.2 $\mu$m region \footnote{M. Ortlieb and M. Havenith, \textit{J. Phys. Chem. A} \textbf{111}, 7355 (2007) ; K. G. Goroya, Y. Zhu, P. Sun, and C. Duan, \textit{J. Chem. Phys.} \textbf{140}, 164311 (2014) ; Y. Zhang, W. Li, W. Luo, Y. Zhu, and C. Duan, \textit{J. Chem. Phys.} \textbf{146}, 244306 (2017).}. Last year we reported the spectra associated with six rotationally resolved IR bands of FADC, recorded under jet-cooled conditions with the FTIR JET-AILES apparatus at synchrotron SOLEIL, and a QCL spectrometer at MONARIS. A special attention was paid to the analysis of the far-IR \nub{24} fundamental band, associated with the intermolecular in-plane bending mode. Splittings due to vibration-rotation-tunneling motions were clearly observed and assigned. We will present the results of the analysis, using the model recently proposed by Zhang \textit{et al} ,$^{a}$ which is based on the inclusion of a c-type Coriolis-like coupling term to reproduce the rotation-tunneling interaction. This model was successfully used in the 7.2 $\mu$m region. The authors gratefully acknowledge the staff of the AILES beamline at synchrotron SOLEIL. The present work was funded by the French ANR Labex CaPPA through the PIA (contract ANR-11-LABX-0005-01), by the Regional Council Hauts de France, and by the European Funds for Regional Economic Development (FEDER).
Issue Date:06/20/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100469
DOI:10.15278/isms.2018.WC07
Other Identifier(s):WC07
Date Available in IDEALS:2018-08-17
2018-12-12


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