Photoinduced dynamics in protonated aromatic amino acid

Gilles Grégoire (1) , Bruno Lucas (2) , Michel Barat (2) , Jacqueline Fayeton (2) , Claude Dedonder-Lardeux (3) , Christophe Jouvet (3)

1 LPL - Laboratoire de Physique des Lasers
2 LCAM - Laboratoire des collisions atomiques et moléculaires
3 PPM - Laboratoire de Photophysique Moléculaire

UV photoinduced fragmentation of protonated aromatics amino acids have emerged the last few years, coming from a situation where nothing was known to what we think a good understanding of the optical properties. We will mainly focus this review on the tryptophan case. Three groups have mostly done spectroscopic studies and one has mainly been involved in dynamics studies of the excited states in the femtosecond/picosecond range and also in the fragmentation kinetics from nanosecond to millisecond. All these data, along with high level ab initio calculations, have shed light on the role of the different electronic states of the protonated molecules upon the fragmentation mechanisms.

Mots clés: Mass spectra; Radiationless transitions; quenching

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

Gilles Grégoire, Bruno Lucas, Michel Barat, Jacqueline Fayeton, Claude Dedonder-Lardeux, et al.. Photoinduced dynamics in protonated aromatic amino acid. 2008. ⟨hal-00222045⟩