Issue 30, 2023

Mechanism landscape in pyrylium induced organic afterglow systems

Abstract

Manipulation of excited states and their dynamics represents a central topic in luminescence systems. We report an unexpected emergence of a high-performance organic afterglow in pyrylium induced photopolymerization systems, as well as the establishment of the mechanism landscape of the afterglow systems as a function of monomer types. In the case of methyl methacrylate, after pyrylium-catalyzed photopolymerization, the obtained materials exhibit a TADF-type organic afterglow with an afterglow efficiency of 70.4%. By using heavy-atom-containing methacrylate, the external heavy atom effect speeds up phosphorescence decay and switches on room-temperature phosphorescence in pyrylium-polymer systems. When 9-vinylcarbazole is used, the resultant materials display organic long persistent luminescence with hour-long durations and emission maxima around 650 nm. The intriguing mechanism landscape reflects the delicate balance of multiple photophysical processes in the pyrylium induced organic afterglow systems, which has been rarely explored in the reported studies.

Graphical abstract: Mechanism landscape in pyrylium induced organic afterglow systems

Supplementary files

Article information

Article type
Edge Article
Submitted
22 Mar 2023
Accepted
05 Jul 2023
First published
06 Jul 2023
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2023,14, 8180-8186

Mechanism landscape in pyrylium induced organic afterglow systems

G. Wang, X. Chen, X. Li, Y. Zeng and K. Zhang, Chem. Sci., 2023, 14, 8180 DOI: 10.1039/D3SC01500A

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