Tsuboi, Taiju and Penzkofer, A. and Slyusareva, E. and Sizykh, A. (2011) Photoluminescence properties of fluorone dyes in bio-related films at low temperatures. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 222 (2-3). pp. 336-342. ISSN 1010-6030,
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The fluorescence and phosphorescence behavior of the fluorone dyes disodium fluorescein (uranine), 4,5-dibromofluorescein, eosin Y, erythrosine B, and rose bengal in biofilms of chitosan, gelatin, and starch was studied in the temperature range from 293 K to 12 K. Luminescence quantum yields, fluorescence quantum yields, and triplet quantum yields were determined. The fluorescence quantum yield generally increased with lowering the temperature at a high level of absolute quantum yield, while the phosphorescence quantum yield increased with decreasing temperature at a low level of absolute quantum yield. The strongest phosphorescence was found for erythrosine B in starch where the phosphorescence quantum yield increased from 6% at 293 K to 25% at 12K. The temperature dependent luminescence behavior is discussed considering radiative and non-radiative transitions in a spectroscopic-state potential energy surface scheme. (C) 2011 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | XANTHENE DYES; QUANTUM YIELDS; DELAYED FLUORESCENCE; ROOM-TEMPERATURE; PHOSPHORESCENCE; OXYGEN; PROTEINS; STATES; Disodium fluorescein; 4,5-Dibromofluorescein; Eosin Y; Erythrosine B; Rose bengal; Low-temperature fluorescence; Low-temperature phosphorescence; Internal conversion; Intersystem-crossing |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Alfons Penzkofer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Jun 2020 09:03 |
| Last Modified: | 02 Jun 2020 09:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20393 |
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