biostudies-literatureUnknown16(1)Yang YOrganic 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 (OCH<sub>3</sub>-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. OCH<sub>3</sub>-DNaAPh is thus selected for implementing quantitative monitoring and an automated alarm sNature communications8356https://www.ebi.ac.uk/biostudies/studies/S-EPMC12460660biostudies-literatureConstructing an auto triplet excitons supply system for photogenerated radicals in the solid state.PMC12460660Yang JYang YLi ZTong LCui XFang MWang JfalseConstructing an auto triplet excitons supply system for photogenerated radicals in the solid state.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 (OCH<sub>3</sub>-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. OCH<sub>3</sub>-DNaAPh is thus selected for implementing quantitative monitoring and an automated alarm s2025-01-01T00:00:00Z2025 Sep2026-06-03T19:37:42.446Z2026-04-30T03:12:26.228ZS-EPMC124606604099311410.1038/s41467-025-61353-5