Titre :

Is it possible to maintain photomechanical properties of crystalline diarylethenes after thermal amorphization?

Auteur(s) :

Louati, Maroua [Auteur]
Laboratoire de Spectrochimie et Raman (LASIR) - UMR 8516
Unité Matériaux et Transformations (UMET) - UMR 8207
Barrau, Sophie [Auteur]
174496|||Unité Matériaux et Transformations - UMR 8207 [UMET]
Tahon, Jean-Francois [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Brosseau, Arnaud [Auteur]
Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires [PPSM]
Takao, Marumi [Auteur]
Takeshita, Michinori [Auteur]
Métivier, Rémi [Auteur]
Buntinx, Guy [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Aloise, Stephane [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Titre de la revue :

Journal of Molecular Structure

Nom court de la revue :

Journal of Molecular Structure

Numéro :

1261

Pagination :

132857

Éditeur :

Elsevier BV

Date de publication :

2022-08

ISSN :

0022-2860

Mot(s)-clé(s) en anglais :

Dithienylethenes
Thermal amorphization
Crystals
Photomechanical properties
Plastic deformations
Material jumping

Discipline(s) HAL :

Chimie/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

The photomechanical properties of the photochromic 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene (DTE) crystals, largely documented since the discovery by Irie et al. of its reversible photoswitching of ...
Lire la suite >The photomechanical properties of the photochromic 1,2-bis(2,4-dimethyl-5-phenyl-3-thienyl)perfluorocyclopentene (DTE) crystals, largely documented since the discovery by Irie et al. of its reversible photoswitching of crystallographic plane morphology, is renewed with a novel approach consisting on suppressing gradually dynamical effects through thermal amorphization. In the crystalline case, the reversibility of UV/Visible induced plastic deformations have been observed as expected. In addition, a number of large jumps for both cycles are reported for the first time for this molecule in contrast to being observed only during the first UV irradiation cycle for other DTEs. In the amorphous case, several striking results have been obtained: (i) the still present reversible photoinduced plastic deformations mimicking the crystalline case are interpreted in terms of apparent polyamorphism; (ii) the total vanishing of the jumps brings the evidence of the crucial role of the crystallinity for the propelling surface in contact with the substrate; (iii) the discovery of a never reported material jump during the first visible cycle. This last result is rationalized combining two features –a thermal one, a glass transition temperature very close to the room temperature (Tg ≈ 34°C) and –a photochemical one, an inefficient photoreversion allowing the other vibrational relaxation pathway to proceed inducing the required temperature rise to overpass the phase transition (Solid → Liquid) responsible for the jump.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2022-04-04T05:55:45Z
2022-04-04T06:48:11Z
2022-04-04T08:42:56Z