Activation of coherent lattice phonon following ultrafast molecular spin-state photo-switching: a molecule-to-lattice energy transfer - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Structural Dynamics Année : 2016

Activation of coherent lattice phonon following ultrafast molecular spin-state photo-switching: a molecule-to-lattice energy transfer

Résumé

We combine ultrafast optical spectroscopy with femtosecond X-ray absorption to study the photo-switching dynamics of the [Fe(PM-AzA)2(NCS)2] spin-crossover molecular solid. The light-induced excited spin-state trapping process switches the molecules from low spin to high spin (HS) states on the sub-picosecond timescale. The change of the electronic state (<50 fs) induces a structural reorganization of the molecule within 160 fs. This transformation is accompanied by coherent molecular vibrations in the HS potential and especially a rapidly damped Fe-ligand breathing mode. The time-resolved studies evidence a delayed activation of coherent optical phonons of the lattice surrounding the photoexcited molecules.
Fichier principal
Vignette du fichier
MS_Figures.pdf (2.03 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01226720 , version 1 (20-11-2015)

Identifiants

Citer

Andrea Marino, Marco Cammarata, Samir F. Matar, Jean-François Létard, Guillaume Chastanet, et al.. Activation of coherent lattice phonon following ultrafast molecular spin-state photo-switching: a molecule-to-lattice energy transfer. Structural Dynamics, 2016, 3 (2), 023605 (15 p.). ⟨10.1063/1.4936290⟩. ⟨hal-01226720⟩
217 Consultations
129 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More