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Durham University

Department of Physics

Staff profile

Publication details for Associate Professor Fernando Dias

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 (2019). Dynamics of aggregated states resolved by gated fluorescence in films of room temperature phosphorescent emitters. Physical Chemistry Chemical Physics 21(7): 3814-3821.

Author(s) from Durham

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.