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Decomposition of a phthalocyanine dye in various conditions under UV or visible light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
28587 44081 2006 6 PDF Available
Title
Decomposition of a phthalocyanine dye in various conditions under UV or visible light irradiation
Abstract

The photostability of a copper complex of a phthalocyanine dye at 313 nm and under visible light was investigated in various solvents both in the presence or absence of O2. The dye was found relatively stable in water, while substantial decomposition, in different times, occurs in methanol, ethanol, acetone and dimethylformamide. A study of the products formed in some of these solvents was performed, allowing to elucidate the mechanism of the colour fading. An interesting and unexpected effect was found in the case of mixed solvents. The presence of acetone in the hydroxylated solvents, even at very low concentration, increases dramatically the rate of decomposition of the dye. This effect is strongly enhanced with increasing of the aliphatic chain size of the ketone. A hypothesis on this effect is put forward.

Keywords
Phthalocyanine dye; Singlet oxygen; Photostability; Mixed solvent
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Decomposition of a phthalocyanine dye in various conditions under UV or visible light irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 184, Issues 1–2, 15 November 2006, Pages 135–140
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Price was $35.95
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