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Title

Singlet Fission Mediated Photophysics of BODIPY Dimers

AuthorsMontero, R.; Martínez-Martínez, V.; Longarte, A.; Epelde-Elezcano, N.; Palao, E.; Lamas, I.; Manzano, H.; Agarrabeitia, A.R.; López Arbeloa, I.; Ortiz, M.J.; Garcia-Moreno, I. CSIC ORCID
Issue Date2018
CitationJournal of Physical Chemistry Letters 9: 641- 646 (2018)
AbstractThe photodynamics of an orthogonal BODIPY dimer, particularly the formation of triplet states, has been explored by femtosecond and nanosecond transient absorption measurements. The short time scale data show the appearance of transient features of triplet character that, according to quantitative analysis of their intensities, account for more than 100% of the initially excited molecules, which reveals the occurrence of a singlet fission process in the isolated dimers. The formation rate of the triplet correlated state (TT) is found to depend on the solvent polarity, pointing to the mediation of a charge transfer character state. The dissociation of the (TT) state into pairs of individual triplets determines the triplet yield measured in the long time scales. The kinetic model derived from the results provides a comprehensive view of the photodynamics of BODIPY dimers and permits rationalization of the photophysical parameters of these systems.
URIhttp://hdl.handle.net/10261/167307
DOIhttp://dx.doi.org/10.1021/acs.jpclett.7b03074
Identifiersdoi: 10.1021/acs.jpclett.7b03074
issn: 1948-7185
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