Dynamics of aggregated states resolved by gated fluorescence in films of room temperature phosphorescent emitters.
Phys Chem Chem Phys
; 21(7): 3814-3821, 2019 Feb 13.
Article
em En
| MEDLINE
| ID: mdl-30698176
ABSTRACT
Phenazine derivative molecules were studied using steady state and time resolved fluorescence techniques and demonstrated to lead to strong formation of aggregated species, identified as dimers by time dependent density functional theory calculations. Blended films in a matrix of Zeonex®, produced at different concentrations, showed different contributions of dimer and monomer emissions in a prompt time frame, e.g. less than 50 ns. In contrast, the phosphorescence (e.g. emission from the triplet state) shows no significant effect on dimer formation, although strong dependence of the phosphorescence intensity on concentration is observed, leading to phosphorescence being quenched at higher concentration.
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MEDLINE
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En
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2019
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Article