Cisoid-cis intermediate plays a crucial role in decolouration rate in photochromic reaction of 8H-pyranoquinazolines and 3H-naphthopyrans - Université de Lille Accéder directement au contenu
Article Dans Une Revue Dyes and Pigments Année : 2022

Cisoid-cis intermediate plays a crucial role in decolouration rate in photochromic reaction of 8H-pyranoquinazolines and 3H-naphthopyrans

S. Brazevic
  • Fonction : Auteur
M. Sikorski
  • Fonction : Auteur
J. Abe
  • Fonction : Auteur
M. F. Rode
  • Fonction : Auteur
G. Burdzinski
  • Fonction : Auteur

Résumé

The photochromic reaction of 8H-pyranoquinazoline shows intriguing aspects in comparison to 3H-naphthopyrans. These come from a stabilized excited singlet state for 8 H-pyranoquinazoline, which has a longer lifetime and is strongly sensitive to the solvent. The polar solvent acetonitrile reduces the quantum yield of coloured isomer formation (transoid-cis species). Colour fading related to the decay of transoid-cis population is faster than that for 3H-naphthopyran family and occurs within few seconds time-window in solution at room temperature. Theoretical calculations show the crucial role in fading process played by the potential energy landscape, with the cisoid-cis intermediate located in a shallow high-energy minimum.
Fichier non déposé

Dates et versions

hal-04512439 , version 1 (20-03-2024)

Identifiants

Citer

S. Brazevic, M. Sikorski, Michel Sliwa, J. Abe, M. F. Rode, et al.. Cisoid-cis intermediate plays a crucial role in decolouration rate in photochromic reaction of 8H-pyranoquinazolines and 3H-naphthopyrans. Dyes and Pigments, 2022, Dyes and Pigments, 201, ⟨10.1016/j.dyepig.2022.110249⟩. ⟨hal-04512439⟩
4 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More