Energy transfer from mesitylene and benzene to 9,10-diphenylanthracene. The influence of donor concentration

• Published in: Journal of luminescence 1986-08, Vol.35 (5), p.301-309
• Main Author: Vieira Ferreira, L.F.
• Format: Article
• Language: English
• Subjects: Atomic and molecular physics; Exact sciences and technology; Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion); Molecular properties and interactions with photons; Physics
• ISSN: 0022-2313; 1872-7883
• DOI: 10.1016/0022-2313(86)90053-0

Nonradiative energy transfer from neat and diluted mesitylene and benzene to 9,10-diphenylanthracene (DPA) was studied in high concentrations of the donors (mesitylene in the range of 7.2 to 0.72 M and benzene from 11.2 to 1.12 M). A new set of equations is presented for steady-state analysis of the emission of the excited monomer and excimer in the presence or absence of an acceptor. Experimental values obtained for the ratio of the fluorescence emission quantum yield of the donor in the absence and presence of the acceptor (φ 0/φ) X as a function of the acceptor concentration C DPA show positive deviations from linearity that are compatible with the use of an effective radius R eff greater than the collisional radius R e, suggesting the existence of energy migration in the donor competing with the diffusion process.