ArticleThe journal of physical chemistry letters2024
An Extension of the Stern-Volmer Equation for Thermally Activated Delayed Fluorescence (TADF) Photocatalysts.
Article in The journal of physical chemistry letters, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- When less is more: harnessing optimal quencher concentrations to maximize quantum yields in TADF photoredox reactions.Chemical science · 2026Article
- 4CzIPN Photosensitizes the Cobaloxime-Catalyzed Light-Driven Hydrogen Evolution Reaction.ChemSusChem · 2026Article
- An integrated and portable optoelectronic biosensing system for rapid post-extraction on-site quantification of Heterosigma akashiwo.Mikrochimica acta · 2026Article
- Thermally activated delayed fluorescence photocatalysts: a kinetic model to predict time-resolved spectroscopic experiments and photoreactions under continuous irradiation.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2026Article
- Reactivity of organic photocatalysts displaying thermally activated delayed fluorescence (TADF): rationalizing unexpected differences between rates of quenching of the lowest singlet and triplet states.Chemical science · 2025Article
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Abstract
Fluorescence quenching experiments are essential mechanistic tools in photoredox catalysis, allowing one to elucidate the first step in the catalytic cycle that occurs after photon absorption. Thermally activated delayed fluorescence (TADF) photocatalysts, however, yield nonlinear Stern-Volmer plots, thus requiring an adjustment to this widely used method to determine the efficiency of excited state quenching. Here, we derive an extension of the Stern-Volmer equation for TADF fluorophores that considers quenching from both the singlet and triplet excited states and experimentally verify it with fluorescence quenching experiments using the commonly employed TADF-photocatalyst 4CzIPN, and multiple-resonance TADF-photocatalyst QAO with three different quenchers in four solvents. The experimental data are perfectly described by this new equation, which in addition to the Stern-Volmer quenching constants allows for the determination of the product of intersystem and reverse intersystem crossing quantum yields, a quantity that is independent of the quencher.
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