Singlet Fission Mediated Photophysics of BODIPY Dimers



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Montero, Raul and Martínez Martínez, Virginia and Longarte, Asier and Epelde Elezcano, Nerea and Palao Utiel, Eduardo and Lamas, Iker and Manzano, Hegoi and Rodríguez Agarrabeitia, Antonia and López Arbeloa, Íñigo María and Ortíz García, María Josefa and García Moreno, Inmaculada (2018) Singlet Fission Mediated Photophysics of BODIPY Dimers. Journal of physical chemistry letters, 9 (3). pp. 641-646. ISSN 1948-7185

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The 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 1(TT) is found to depend on the solvent polarity, pointing to the mediation of a charge transfer character state. The dissociation of the 1(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.

Item Type:Article
Uncontrolled Keywords:Photophysics; BODIPY dimers; Solvents; Solvent polarity; Kinetic model; Photophysical parameters
Subjects:Sciences > Chemistry > Chemistry, Physical and theoretical
Sciences > Chemistry > Chemistry, Organic
ID Code:47061
Deposited On:06 Apr 2018 08:14
Last Modified:09 Apr 2018 07:49

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