http://www.cnr.it/ontology/cnr/individuo/prodotto/ID51057
Triplet energy exchange between fluorescent and phosphorescent organic molecules in a solid state matrix (Articolo in rivista)
- Type
- Label
- Triplet energy exchange between fluorescent and phosphorescent organic molecules in a solid state matrix (Articolo in rivista) (literal)
- Anno
- 2004-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.chemphys.2003.09.041 (literal)
- Alternative label
J. Kalinowski, W. Stampor, M. Cocchi, D. Virgili, V. Fattori, P. Di Marco (2004)
Triplet energy exchange between fluorescent and phosphorescent organic molecules in a solid state matrix
in Chemical physics (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- J. Kalinowski, W. Stampor, M. Cocchi, D. Virgili, V. Fattori, P. Di Marco (literal)
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- J. Kalinowski, W. Stampor; Gdansk Tech Univ, Dept Mol Phys, PL-80952 Gdansk, Poland -
M. Cocchi, D. Virgili, V. Fattori, P. Di Marco; Natl Res Council Italy, ISOF, CNR, Inst Organ Synth & Photoreact, I-40129 Bologna, Italy (literal)
- Titolo
- Triplet energy exchange between fluorescent and phosphorescent organic molecules in a solid state matrix (literal)
- Abstract
- The measured lifetime of the triplet state in a phosphorescent iridium complex [Ir(ppy)(3)] lengthens as the concentration of a fluorescent diamine derivative (TPD) in their mixture in a polycarbonate (PC) matrix increases. The effect is explained by the Dexter-type triplet energy exchange between these molecules. The localization Bohr's radius is found to be 1.1 Angstrom for [Ir(ppy)(3)] and 2.4 Angstrom for TPD molecules. The long-living triplet states of TPD form a transient reservoir of excitation energy for short-living triplets of [Ir(ppy)(3)] (the excitation energy \"reservoir effect\"). The rates of forward and back energy transfer are interrelated through their energy, intrinsic lifetimes and intermolecular distance. The critical donor-acceptor distance at which energy transfer competes equally with the total rate of other triplet exciton decay pathways is found to be R-0=(1.05+/-0.02) nm. These results may be the first quantitative analysis of the \"reservoir effect\" in solid solutions. (literal)
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