CAROFISSION

Singlet exciton fission in carotenoids molecules: from photoprotection to photo-catalysis



Résumé
Learning lessons on how nature manage the efficient capture and usage of sunlight to store it in chemical form are fundamental for the development of a sustainable world. Singlet fission, as discovered in self-assembled carotenoids, is an ultrafast conversion of one absorbed photon into two triplet states that provides new realms to achieve 200% photon-to-charge conversion. In this proposal, we wish to understand the origin and properties of this phenomenon in self-assembled carotenoids inside plastids. Our defining target is to unravel how the propitious environment of carotenoids provided by Nature governs the reactivity of excited states and gives remarkable robustness to the entire ensemble molecules-matrix. We will take profit of singlet fission to generate long-lived and energetically sufficient triplet pairs to address and overcome the intrinsic kinetic hurdle from the classic sequential light induced excited processes for two-electron transfer chemical reactions in a synchronized two-electron transfer reaction.

Mots-clés
carotenoids, singlet fission, photocatalisys, energy, photophysicis

Partenaires du projet

INSB
LLANSOLA-PORTOLES Manuel
(UMR9198) Gif-sur-Yvette France
INC
HALIME Zakarie
Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR8182) France
LLANSOLA-PORTOLES
Crédit photo : LLANSOLA-PORTOLES