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Wavelength dependence of light-induced fading and free radical formation in azoreactive dyes |
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| Authors: | Edit Rmi Antal Rockenbauer Lszl Korecz Istvn Rusznk Andrs Víg |
| Institution: | a Technical University of Budapest, Department of Organic Chemical Technology, Mûegyetem rkp. 3, H-1111 Budapest, Hungary b Research Group of the Hungarian Academy of Sciences, at Department of Organic Chemical Technology, TUB, Mûegyetem rkp. 3, H-1111 Budapest, Hungary c Central Research Institute for Chemistry of the Hungarian Academy of Sciences, Pusztaszeri u. 59-67, H-1025 Budapest, Hungary |
| Abstract: | Light-induced stable free radicals (SFRs) were detected in azoreactive dyed cotton fabrics. Extremely slow photofading occurred under exposure to light of relatively long wavelength. The rate of photofading and SFR formation depend on the structure of the dye. Some of them show little drop in the rate of fading with the increasing wavelength, whereas others show nearly negligible changes under incident light of relatively long wavelength. In general a high rate of photofading was found when the SFR concentration was low. |
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