Photo-dissociation of naphthalene dimer cations stored in a compact electrostatic ion storage ring - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Journal of Chemical Physics Année : 2019

Photo-dissociation of naphthalene dimer cations stored in a compact electrostatic ion storage ring

Résumé

Naphthalene dimer cations [C10H8]2+ have been produced by using an electron cyclotron resonance plasma ion source and stored in a compact electrostatic ion storage ring. We show that the radiative cooling of these cations is much slower than the isolated monomer naphthalene cations. We also report on photo-dissociation studies in the gas phase of naphthalene dimer cations at high internal energy. The dissociation energy is estimated to 0.5 eV in close agreement with previous measurements but a factor of 2 smaller than recent (density functional theory (DFT) and ab initio) theoretical studies. As uncertainties on theory as well as on the experiment cannot be as large as this difference, we conclude that this discrepancy may be due to temperature effects with possible isomerization. As an interpretation of the photo-dissociation spectrum of naphthalene dimer cations, we propose a tentative simple analytical model based on effective Morse potentials. These effective potentials are expected to “average” temperature effects that would apparently result in a smaller energy difference between the fundamental and dissociation states due to the twisting vibration modes of the naphthalene dimer cations.
Fichier principal
Vignette du fichier
Bernard et al_2019_Photo-dissociation of naphthalene dimer cations stored in a compact.pdf (1.96 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03011418 , version 1 (20-11-2020)

Identifiants

Citer

Jérôme Bernard, Abdulaziz Al-Mogeeth, Abdul-Rahman Allouche, Lin Chen, Guillaume Montagne, et al.. Photo-dissociation of naphthalene dimer cations stored in a compact electrostatic ion storage ring. Journal of Chemical Physics, 2019, 150 (5), pp.054303. ⟨10.1063/1.5055939⟩. ⟨hal-03011418⟩
89 Consultations
115 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More