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Title:Synchotron-based high resolution spectroscopy of N-bearing PAHS
Author(s):Gruet, Sébastien
Contributor(s):Brechignac, Philippe; Goubet, Manuel; Pirali, Olivier
Abstract:For thirty years,\footnote{A. Leger, J. L. Puget, \textit{Astron. Astrophys.} \textbf{137}, L5-L8 (1984); L. J. Allamandola et al. \textit{Astrophys. J.} \textbf{290}, L25-L28 (1985).} the Polycyclic Aromatic Hydrocarbons (PAHs) have been suspected to give rise to the numerous Unidentified Infrared Bands (UIBs) observed in most astrophysical objects. Pure carbon molecules as well as derivatives with nitrogen atom(s) incorporated into the carbon skeleton have been considered. These N-bearing molecules are interesting candidates for astronomical research since they possess a larger permanent dipole moment than purely carbon-based PAHs. Most of the data reported in the literature deal with rotationally unresolved data. During the last decade, high-resolution microwave spectroscopy initiated high resolution studies of this broad family of molecules.\footnote{Z. Kisiel et al. \textit{J. Mol. Spectrosc.} \textbf{217}, 115 (2003); S. Thorwirth et al. \textit{Astrophys. J.} \textbf{662}, 1309 (2007); D. McNaughton et al. \textit{J. Chem. Phys.} \textbf{124}, 154305 (2011).} Recent advances in laboratory techniques permitted to provide interesting new results to rotationally resolve the IR/Far-IR vibrational bands of these relatively large C-bearing molecules\footnote{S. Albert et al. \textit{Faraday Discuss.} \textbf{150}, 71-99 (2011); B. E. Brumfield et al. \textit{Phys. Chem. Lett.} \textbf{3}, 1985-1988 (2012); O. Pirali et al. \textit{Phys. Chem. Chem. Phys.} \textbf{15}, 10141 (2013).},in particular, making use of synchrotron radiation as the IR continuum source of high resolution Fourier transform (FT) spectrometers. We will present an overview of the synchrotron-based high resolution FTIR spectroscopy of 5 aza-derivatives of naphthalene (isoquinoline, quinoline, quinoxaline, quinazoline, [1,5] naphthyridine) using a room temperature long path absorption cell at the French facility SOLEIL. In support to the rovibrational analysis of these FIR spectra, very accurate anharmonic DFT calculations were performed.\footnote{M. Goubet, O. Pirali, J. \textit{Chem. Phys.}, \textbf{140}, 044322 (2014).}
Issue Date:2014-06-16
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:Gruet, S.; Brechignac, P.; Goubet, M.; Pirali, O. SYNCHROTRON-BASED HIGH RESOLUTION SPECTROSCOPY OF N-BEARING PAHS. Proceedings of the International Symposium on Molecular Spectroscopy, Urbana, IL, June 16-21, 2014. DOI: 10.15278/isms.2014.MF15
Rights Information:Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License.
Date Available in IDEALS:2014-09-17

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