Tict fluorescence in rigid matrices: α-delayed fluorescence

✍ Scribed by C. Cazeau-Dubroca; A. Peirigua; S.Ait Lyazidi; G. Nouchi; Ph. Cazeau; R. Lapouyade

• Book ID: 103029392
• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 390 KB
• Volume: 124
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(86)85128-4

✦ Synopsis

The observation of the dual fluorescence of 4-N,N-dimethylaminobenzonitrile (Dh4ABN) in polyvinylalcohol has been extended to other matrices able to act as hydrogen-bond donors (nylon and polyurethane) and to related molecules. A model of a-delayed fluorescence is proposed to account for the properties of the luminescence in rigid matrices. This proposal is consistent with: the positive polarization of the anomalous fluorescence (room temperature) while the polarization of phosphorescence is negative (at 77 K); the quenching of the anomalous fluorescence by lowering the temperature; the very long lifetime (r = 1 s) of the anomalous fluorescence, in the same range as the phosphorescence lifetime.