Work

Constructing an auto triplet excitons supply system for photogenerated radicals in the solid state

Year: 2025

Type: article

Abstract: Organic radical materials have attracted significant attention for their unique photophysical properties and potential applications. Herein, we propose an auto triplet excitons supply system to generate radicals through the photoinduced electron transfer process for practical applications. By manipulating the n-π* transition and p-π conjugation, we achieve enhanced photoactivated phosphorescence coupled with rapid radical generation rates in the methoxy-substituted naphthylamine derivative (OCH3-DNaAPh) and fluorine-substituted naphthylamine derivative (F-DNaAPh), confirming the crucial role of the long-lived excitons supply in generating stable radicals upon UV irradiation. OCH3-DNaAPh is thus selected for implementing quantitative monitoring and an automated alarm system for UV radiation, featuring a two-stage risk warning model for excessive UV exposure. Furthermore, it acts as the photoinitiator for the polymerization of methyl methacrylate under UV irradiation, further enhancing phosphorescence emission above 473 K. The study describes a method to generate organic photogenerated radicals in the solid state, broadening their scope of practical applications. Organic radical materials have attracted significant attention for their photophysical properties and potential applications. Here, the authors show by manipulating the n-π* transition and p-π conjugation in a poly(methyl methacrylate) matrix, long-lived excitons and stable radicals can be generated by UV irritation.

Source: Nature Communications

DOI: 10.1038/s41467-025-61353-5