Endroit: A-2553, Campus MIL
Heure: Dès 11h00
Titre: Crystal Engineering of Room Temperature Phosphorescence in Organic Solids
Résumé: Phosphorescence as a spin-forbidden process (radiative T1 to So relaxation) is inefficient in organic materials. As a result, purely organic room temperature phosphors (ORTPs) are scarce, and their rational design is a fundamental and still unaddressed challenge. This presentation describes our efforts to engineer phosphorescence in organic solids by i) tuning the molecular packing in molecular crystals using steric size of substituents, ii) covalently doping halogens into covalent organic frameworks (COFs) as an emerging class of porous solids, in which the topology of the solid-state can be designed using reticular chemistry principles. The latter strategy, allowed for fine-tuning the photophysical properties of the doped COFs using different dopants and ratios, and their permanent porosity is exploited for oxygen gas detection across a broad pressure range (~103–10−5 torr partial O2 pressure).
