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Photoluminescence properties of fluorone dyes in bio-related films at low temperatures

Paper ID Volume ID Publish Year Pages File Format Full-Text
28642 44083 2011 7 PDF Available
Title
Photoluminescence properties of fluorone dyes in bio-related films at low temperatures
Abstract

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 12 K. The temperature dependent luminescence behavior is discussed considering radiative and non-radiative transitions in a spectroscopic-state potential energy surface scheme.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Fluorescence quantum distributions of fluorones in temperature range 293–12 K were determined. ► Phosphorescence quantum yields of fluorones in temperature range 293–12 K were determined. ► Spectroscopic-state potential energy model was used for description of luminescence behavior. ► Fluorescence increased with decreasing temperature at high absolute quantum yield level. ► Phosphorescence increased with decreasing temperature at low absolute quantum yield level.

Keywords
Disodium fluorescein; 4,5-Dibromofluorescein; Eosin Y; Erythrosine B; Rose bengal; Low-temperature fluorescence; Low-temperature phosphorescence; Internal conversion; Intersystem-crossing
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Photoluminescence properties of fluorone dyes in bio-related films at low temperatures
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 222, Issues 2–3, 15 August 2011, Pages 336–342
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us