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Dynamics of aggregated states resolved by gated fluorescence in films of room temperature phosphorescent emitters

dos Santos, Paloma Lays Lays; Silveira, Orlando José; Huang, Rogjuan; Jardim, Guilherme; Matos, Matheus Josue Souza; da Silva Júnior, Eufrânio N.; Monkman, Andrew P; Dias, Fernando B.; Cury, Luiz Alberto

Dynamics of aggregated states resolved by gated fluorescence in films of room temperature phosphorescent emitters Thumbnail


Authors

Paloma Lays Lays dos Santos

Orlando José Silveira

Rogjuan Huang

Guilherme Jardim

Matheus Josue Souza Matos

Eufrânio N. da Silva Júnior

Andrew P Monkman

Luiz Alberto Cury



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.

Citation

dos Santos, P. L. L., Silveira, O. J., Huang, R., Jardim, G., Matos, M. J. S., da Silva Júnior, E. N., …Cury, L. A. (2019). Dynamics of aggregated states resolved by gated fluorescence in films of room temperature phosphorescent emitters. Physical Chemistry Chemical Physics, 21(7), 3814-3821. https://doi.org/10.1039/c8cp07005a

Journal Article Type Article
Acceptance Date Jan 17, 2019
Online Publication Date Jan 22, 2019
Publication Date Feb 21, 2019
Deposit Date Jan 29, 2019
Publicly Available Date Mar 29, 2024
Journal Physical Chemistry Chemical Physics
Print ISSN 1463-9076
Electronic ISSN 1463-9084
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 21
Issue 7
Pages 3814-3821
DOI https://doi.org/10.1039/c8cp07005a

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