PHOTOINDUCED LUMINESCENCE AND EPR SIGNALS OF POLYPHENOL AND QUINONE POLYMERS |
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| Authors: | D Slawinska J Slawinski T Sarna |
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| Institution: | Institute of Physics, Technical University, Szczecin;Department of Physics, Institute of Agricultural Mechanization, Agricultural Academy, ul. Janosika 8, 71–424 Szczecin, Poland;Institute of Molecular Biology, Jagiellonian University, Krakow |
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| Abstract: | Abstract— Aqueous basic solutions, pH 9.0 of humic acids and melanin-like, synthetic polymers, obtained with adrenochrome, hydroquinone and purpurogallin, were illuminated with visible light under N2 or O2 atmospheres. It has been found that light enhances a singlet electron-paramagnetic-resonance (EPR) signal of polymers both under N2 and O2, and induces ultra-weak luminescence in the presence of O2. Degradative oxidation of polymers, accelerated by light, leads to a decrease of EPR signal intensity and generates weak chemiluminescence. |
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