Article Dans Une Revue The Journal of Chemical Physics Année : 2004

Dissociation energies of six NO2 isotopologues by laser induced fluorescence spectroscopy and zero point energy of some triatomic molecules

Résumé

We have measured the rotationless photodissociation threshold of six isotopologues of NO2 containing 14N, 15N, 16O, and 18O isotopes using laser induced fluorescence detection and jet cooled NO2 ~to avoid rotational congestion!. For each isotopologue, the spectrum is very dense below the dissociation energy while fluorescence disappears abruptly above it. The six dissociation energies ranged from 25 128.56 cm21 for 14N16O2 to 25 171.80 cm21 for 15N18O2 . The zero point energy for the NO2 isotopologues was determined from experimental vibrational energies, application of the Dunham expansion, and from canonical perturbation theory using several potential energy surfaces. Using the experimentally determined dissociation energies and the calculated zero point energies of the parent NO2 isotopologue and of the NO product~s! we determined that there is a common De 526 051.1760.70 cm21 using the Born-Oppenheimer approximation. The canonical perturbation theory was then used to calculate the zero point energy of all stable isotopologues of SO2, CO2 , and O3 , which are compared with previous determinations.

Fichier non déposé

Dates et versions

hal-00508420 , version 1 (03-08-2010)

Identifiants

Citer

Dominique Sugny, Marc Joyeux, Rémy Jost, G. Michalski, M. Thiemens. Dissociation energies of six NO2 isotopologues by laser induced fluorescence spectroscopy and zero point energy of some triatomic molecules. The Journal of Chemical Physics, 2004, 121 (15), pp.7153. ⟨10.1063/1.1792233⟩. ⟨hal-00508420⟩
101 Consultations
0 Téléchargements

Altmetric

Partager

  • More