Synchotron-based high resolution spectroscopy of N-bearing PAHS

Gruet, Sébastien

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https://hdl.handle.net/2142/50850 Copy

Description

Title

Synchotron-based high resolution spectroscopy of N-bearing PAHS

Author(s)

Gruet, Sébastien

Contributor(s)

• Brechignac, Philippe
• Goubet, Manuel
• Pirali, Olivier

Issue Date

2014-06-16

Keyword(s)

Astronomy

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).}

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

English

Permalink

http://hdl.handle.net/2142/50850

DOI

https://doi.org/10.15278/isms.2014.MF15

Copyright and License Information

Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

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