{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["5(11)"],"submitter":["Liu L"],"pubmed_abstract":["Classical distance-dependent Dexter energy transfer models fail to account for the complex, geometry-sensitive kinetics observed in flexible and dynamically disordered organic photocatalytic systems. To resolve these persistent inconsistencies, particularly in photosensitized [2 + 2] cycloaddition reactions, we investigate how charge-transfer (CT) intermediates mediate triplet-triplet energy transfer (TTEnT) beyond the conventional Dexter framework. Through a combined approach integrating high-level multistate CASPT2 calculations, ultrafast transient absorption spectroscopy, and electrochemical analysis, we uncover two distinct and previously unrecognized TTEnT pathways: a CT trap mechanism and a CT-mediated sequential TTEnT mechanism in which electron and hole transfer steps bridge the do"],"journal":["JACS Au"],"pagination":["5481-5492"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC12648329"],"repository":["biostudies-literature"],"pubmed_title":["A Charge Transfer Mediated Sequential Triplet Energy Transfer Model Beyond the Dexter Limit in Organic Photocatalysis."],"pmcid":["PMC12648329"],"pubmed_authors":["Liu X","Qiao Y","Liu L","Jie J","Wang Q","Feng K","Fang W","Chen X","Su H","Shi Y"],"additional_accession":[]},"is_claimable":false,"name":"A Charge Transfer Mediated Sequential Triplet Energy Transfer Model Beyond the Dexter Limit in Organic Photocatalysis.","description":"Classical distance-dependent Dexter energy transfer models fail to account for the complex, geometry-sensitive kinetics observed in flexible and dynamically disordered organic photocatalytic systems. To resolve these persistent inconsistencies, particularly in photosensitized [2 + 2] cycloaddition reactions, we investigate how charge-transfer (CT) intermediates mediate triplet-triplet energy transfer (TTEnT) beyond the conventional Dexter framework. Through a combined approach integrating high-level multistate CASPT2 calculations, ultrafast transient absorption spectroscopy, and electrochemical analysis, we uncover two distinct and previously unrecognized TTEnT pathways: a CT trap mechanism and a CT-mediated sequential TTEnT mechanism in which electron and hole transfer steps bridge the do","dates":{"release":"2025-01-01T00:00:00Z","publication":"2025 Nov","modification":"2026-06-05T17:58:55.843Z","creation":"2026-05-19T03:12:08.525Z"},"accession":"S-EPMC12648329","cross_references":{"pubmed":["41311928"],"doi":["10.1021/jacsau.5c00968"]}}