Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2011

Идентификатор DOI: 10.1016/j.jphotochem.2011.07.006

Ключевые слова: Disodium fluorescein, 4,5-Dibromofluorescein, Eosin Y, Erythrosine B, Rose bengal, Low-temperature fluorescence, Low-temperature phosphorescence, Internal conversion, Intersystem-crossing

Аннотация: 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.

Журнал: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

Выпуск журнала: Vol. 222, Is. 2-3

Номера страниц: 336-342

ISSN журнала: 10106030

Место издания: LAUSANNE

Издатель: ELSEVIER SCIENCE SA

• Tsuboi T. (Faculty of Engineering,Kyoto Sangyo University)
• Penzkofer A. (Fakultat fur Physik,Universitat Regensburg)
• Slyusareva E. (Siberian Federal University)
• Sizykh A. (Siberian Federal University)

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