Electronic excited state of protonated aromatic molecules: protonated Fluorene

Ivan Alata (1) , Michel Broquier (1, 2, 3) , Claude Dedonder (1, 2, 3) , Christophe Jouvet (1, 2) , Ernesto Marceca (4)

1 CLUPS - Centre Laser de l'Université Paris Sud
2 ISMO - Institut des Sciences Moléculaires d'Orsay
3 PPM - Laboratoire de Photophysique Moléculaire
4 INQUIMAE - Instituto de Química Física de los Materiales, Medio Ambiente y Energía [Buenos Aires]

The photo-fragmentation spectrum of protonated fluorene has been recorded in the visible spectral region, largely red shifted as compared to the first excited state absorption of neutral fluorene. The spectrum shows two different vibrational progressions, separated by 0.19 eV that are assigned to the absorption of two isomers. As in protonated linear PAHs, comparison with ab-initio calculations indicates that the red shift is due to the charge transfer character of the excited state.

Mots clés: electronic spectra PAH protonated molecules

Domaines: Agrégats Moléculaires et Atomiques [physics.atm-clus]; Chimie-Physique [physics.chem-ph]; Chimie théorique et/ou physique

Ivan Alata, Michel Broquier, Claude Dedonder, Christophe Jouvet, Ernesto Marceca. Electronic excited state of protonated aromatic molecules: protonated Fluorene. Chemical Physics, 2012, 393, pp.25. ⟨10.1016/j.chemphys.2011.11.013⟩. ⟨hal-00592994v3⟩