Titre :

Comparative photophysical investigation of doubly-emissive photochromic-fluorescent diarylethenes

Auteur(s) :

Barrez, E. [Auteur]
École normale supérieure - Cachan [ENS Cachan]
Photophysique et Photochimie Supramoléculaires et Macromoléculaires [PPSM]
Laurent, G. [Auteur]
Photophysique et Photochimie Supramoléculaires et Macromoléculaires [PPSM]
Pavageau, C. [Auteur]
Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires [PPSM]
Sliwa, Michel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Métivier, R. [Auteur]
Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires [PPSM]

Titre de la revue :

Physical Chemistry Chemical Physics

Numéro :

20

Pagination :

2470-2479

Date de publication :

2018

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

Diarylethene molecules showing photochromism and fluorescence properties in both open and closed forms, associated with two different emission colors, are very promising for applications involving ratiometric emissive ...
Lire la suite >Diarylethene molecules showing photochromism and fluorescence properties in both open and closed forms, associated with two different emission colors, are very promising for applications involving ratiometric emissive photoswitches. We report here a complete study on the competition between the multiple photophysical processes involved in the excited states for two sulfone derivatives of benzothiophene-based diarylethene molecules, only differing by the substituent groups on their reactive carbon (methyl for DAE-Me and ethyl for DAE-Et). Steady-state and time-resolved spectroscopy, combined with DFT and TD-DFT calculations, allow a complete determination of the kinetic constants leading to fluorescence and photoreaction pathways in different solvents, and enlighten the specific role of the substituent group in the photophysical properties due to a shielding effect against the solvation environment. The predominant role of the non-radiative deactivation processes in such a family of molecules is shown, and a tentative excited state mechanistic scheme is proposed based on femtosecond transient absorption experiments performed on the closed forms.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
ENSCL
Université de Lille

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Date de dépôt :

2021-11-16T08:23:39Z
2024-02-23T10:15:21Z