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Fourier Transform Microwave and Millimeter-Wave ...
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Document type :
Article dans une revue scientifique
DOI :
10.1021/jp510119e
Title :
Fourier Transform Microwave and Millimeter-Wave Spectroscopy of Bromoiodomethane, CH<sub>2</sub>BrI
Author(s) :
Bailleux, Stéphane [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Duflot, Denis [Auteur]
Physico-Chimie Moléculaire Théorique [PCMT]
Taniguchi, Keisuke [Auteur]
Sakai, S. [Auteur]
Ozeki, Hiroyuki [Auteur]
Bailey, W. C. [Auteur]
Obakayashi, Tomohito [Auteur]
Journal title :
Journal of Physical Chemistry A
Pages :
11744
Publisher :
American Chemical Society
Publication date :
2014-11-24
ISSN :
1089-5639
HAL domain(s) :
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
English abstract : [en]
Bromoiodomethane, CH<sub>2</sub>BrI, is a molecule of natural origin emitted in significant amount into the marine boundary layer. It can easily be decomposed by solar radiation, releasing Br and I atoms in the troposphere, ...
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Bromoiodomethane, CH<sub>2</sub>BrI, is a molecule of natural origin emitted in significant amount into the marine boundary layer. It can easily be decomposed by solar radiation, releasing Br and I atoms in the troposphere, which in turn impacts the atmospheric chemistry. Spectroscopy is an invaluable tool to monitor species present in the atmosphere. Since no high-resolution spectroscopic studies are available for this dihalomethane, we have investigated the rotational spectra of the two bromine isotopologues of CH<sub>2</sub>BrI in its vibrational ground state in the microwave and millimeter-wave regions. Transitions of b-type have been recorded by Fourier transform microwave spectroscopy below 25 GHz while both a- and b-type spectral lines have been measured below 230 GHz. Observed transitions correspond to energy levels with J ≤ 132 and Ka ≤ 14. Molecular constants including those describing the nuclear quadrupole coupling tensors for <sup>79</sup>Br, <sup>81</sup>Br, and <sup>127</sup>I were accurately determined from the least-squares analysis of a total of 1873 distinct transition frequencies (of which 943 belong to the CH<sub>2</sub><sup>79</sup>BrI isotopologue). An experimental (r<sub>0</sub>) structure of the title species has been derived from the two sets of rotational constants.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
ANR Project :
Physiques et Chimie de l'Environnement Atmosphérique
Collections :
  • Laboratoire de Physique des Lasers, Atomes et Molécules (PhLAM) - UMR 8523
Source :
Harvested from HAL
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