ArticleJournal of the American Chemical Society2026
Triplet Energy Transfer as a Handle to Tune 1,2-Dialkyldiazene Fragmentation in Radical C(sp
Article in Journal of the American Chemical Society, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
6 authors.
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Abstract
Mechanistic investigation of light-induced processes is paramount as it not only offers an overall mechanistic picture but also provides information about the efficiency and associated rate constants of the different reaction steps. In some cases, study of systematic series of photosensitizers or quenchers also allows to determine ground-state redox potentials or triplet energy levels of unknown species. Herein, through a combination of steady-state and time-resolved spectroscopic techniques, we elucidate the mechanism of geminate triplet radical pair formation from 1,2-dialkyldiazenes operating via energy transfer from excited photocatalysts. Stern-Volmer and Rehm-Weller analyses confirmed the energy-transfer pathway and provided access to the triplet energy level of two model 1,2-dialkyldiazenes, which were found to be around 2.3 eV. Further evidence was gained by mediator-enhanced triplet energy transfer to an anthracene substrate, showcasing that the excited diazene can serve as an energy shuttle that can be intercepted before bond fragmentation to release N
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