Title :

Selective population of triplet excited states in heavy-atom-free BODIPY-C ₆₀ based molecular assemblies.

Author(s) :

Fatima, Anam [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Rabah, Jad [Auteur]
Institut Lavoisier de Versailles [ILV]
Allard, E. [Auteur]
Institut Lavoisier de Versailles [ILV]
Fensterbank, H. [Auteur]
Institut Lavoisier de Versailles [ILV]
Wright, K. [Auteur]
Institut Lavoisier de Versailles [ILV]
Burdzinski, G. [Auteur]
Faculty of Physics [Poznań]
Clavier, G. [Auteur]
Photophysique et Photochimie Supramoléculaires et Macromoléculaires [PPSM]
Sliwa, Michel [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Pino, T. [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Méallet-Renault, R. [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Steenkeste, K. [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]
Ha-Thi, M. H. [Auteur]
Institut des Sciences Moléculaires d'Orsay [ISMO]

Journal title :

Photochemical & Photobiological Sciences

Abbreviated title :

Photochem Photobiol Sci

Publication date :

2022-05-27

ISSN :

1474-9092

English keyword(s) :

Transient absorption
Triplet lifetime
Fluorescence lifetime
Triplet formation quantum yield
Excited state
Triplet state
Fullerene
BODIPY

HAL domain(s) :

Chimie
Physique [physics]/Physique [physics]

English abstract : [en]

Photophysical studies on a BODIPY-fullerene-distyryl BODIPY triad (BDP-C60-DSBDP) and its reference dyads (BODIPY-fullerene; BDP-C60 and distyryl BODIPY-fullerene; DSBDP-C60) are presented herein. In the triad, the association ...
Show more >Photophysical studies on a BODIPY-fullerene-distyryl BODIPY triad (BDP-C60-DSBDP) and its reference dyads (BODIPY-fullerene; BDP-C60 and distyryl BODIPY-fullerene; DSBDP-C60) are presented herein. In the triad, the association of the two chromophore units linked by a fullerene moiety leads to strong near UV–Visible light absorption from 300 to 700 nm. The triplet-excited state was observed upon visible excitation in all these assemblies, and shown to be localized on the C60 or BODIPY moieties. Using quantitative nanosecond transient absorption, we provide a complete investigation on the lifetime and formation quantum yield of the triplet-excited state. In the BDP-C60 dyad, the triplet excited state of C60 (τ = 7 ± 1 μs) was obtained with a quantum yield of 40 ± 8%. For the DSBDP-C60 dyad and BDP-C60-DSBDP triad, a longer-lived triplet excited state with a lifetime of around 250 ± 20 μs centered on the DSBDP moiety was formed, with respective quantum yields of 37 ± 8 and 20 ± 4%. Triplet–triplet annihilation up-conversion is characterized in the BDP-C60 dyad and the bichromophoric triad in the presence of perylene and DSBDP-monomer as respective annihilators. The photo-induced formation of a long-lived 3DSBDP* in the triad coupled with panchromatic light absorption offers potential applications as a heavy-atom-free organic triplet photosensitizer.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Submission date :

2024-02-28T22:27:15Z
2024-03-19T09:42:50Z