Fast Nonradiative Decay in o‑Aminophenol - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry A Année : 2014

Fast Nonradiative Decay in o‑Aminophenol

Résumé

The gas phase structure of 2-aminophenol has been investigated using UV−UV as well as IR−UV hole burning spectroscopy. The presence of a free OH vibration in the IR spectrum rules out the contribution of the cis isomer, which is expected to have an intramolecular H-bond, to the spectra. The excited state lifetimes of different vibronic levels have been measured with pump−probe picosecond experiments and are all very short (35 ± 5) ps as compared to other substituted phenols. The electronic states and active vibrational modes of the cis and trans isomers have been calculated with ab initio methods for comparison with the experimental spectra. The Franck−Condon simulation of the spectrum using the calculated ground and excited state frequencies of the trans isomer is in good agreement with the experimental one. The very short excited state lifetime of 2-aminophenol can then be explained by the strong coupling between the two first singlet excited states due to the absence of symmetry, the geometry of the trans isomer being strongly nonplanar in the excited state.
Fichier principal
Vignette du fichier
Capello et al. revised manuscript.pdf (1.1 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00965863 , version 1 (30-11-2017)

Identifiants

Citer

Marcela C. Capello, Michel Broquier, Shun-Ichi Ishiuchi, Woon Y. Sohn, Masaaki Fujii, et al.. Fast Nonradiative Decay in o‑Aminophenol. Journal of Physical Chemistry A, 2014, 118 (11), pp.2056-2062. ⟨10.1021/jp411457v⟩. ⟨hal-00965863⟩
91 Consultations
103 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More