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Reactive oxygen species produced by irradiation of some phthalocyanine derivatives

Paper ID Volume ID Publish Year Pages File Format Full-Text
27109 44001 2010 7 PDF Available
Title
Reactive oxygen species produced by irradiation of some phthalocyanine derivatives
Abstract

A comparative study of the reliability of methods used for the determination of singlet oxygen was carried out. The water iodide method, as well as the methods using 9,10-dimethylanthracene (DMA) and 1,3-diphenylisobenzofuran (DPIBF) in dimethylformamide (DMF) solutions, was used for the detection of singlet oxygen 1O2 production in eight phthalocyanine photosensitizers. The iodide method is not only selective for the determination of 1O2 but can also be used for the determination of other oxygen species. In addition, the results of the iodide method are affected by a possible formation of phthalocyanine dimers and by post-irradiation reactions. On the other hand, both the methods using indicators in DMF are highly selective for the determination of 1O2. The quantum yield of the singlet oxygen production was determined for eight phthalocyanine derivatives; the following sequence was obtained: 5 ∼ 4 > 7 ∼ 2 ∼ 8 (standard) > 6 > 3 ∼ 1, where 5 represents the ammonium salt of disulphonated zinc phthalocyanine, 4 sulphonated zinc phthalocyanine [(3-diethylammonium)-propylsulphonamide] citrate, 7 tetrakis(trimethylammonium)zinc phthalocyanine tetraiodide, 2 tetrakis(N-methylpyridinium-3-oxy)zinc phthalocyanine tetraiodide, 8 zinc phthalocyanine, 6 sodium salt of disulphonated aluminum phthalocyanine, 3 sulphonated aluminum phthalocyanine [(N-2-hydroxyethyl)aminoethylsulphonamide] and 1 tetra-methylenepyridinium chloride of hydroxyaluminum phthalocyanine.

Keywords
Singlet oxygen; Photosensitizer; Phthalocyanine; Quantum yield
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Reactive oxygen species produced by irradiation of some phthalocyanine derivatives
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 210, Issue 1, 5 February 2010, Pages 82–88
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