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Characteristics of the reaction between semiquinone radical anion of hypocrellin A and oxygen in aprotic media

✍ Scribed by Yi-zhen Hu; Li-jin Jiang

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
578 KB
Volume
94
Category
Article
ISSN
1010-6030

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Spectroscopic study on the photoreductio
Spectroscopic study on the photoreduction of hypocrellin A: generation of semiquinone radical anion and hydroquinone
✍ Yi-Zhen Hu; Jing-Yi An; Li-Jin Jiang; De-Wen Chen πŸ“‚ Article πŸ“… 1995 πŸ› Elsevier Science 🌐 English βš– 603 KB

Hypocrellin A (HA) is an efficient phototherapeutic agent. Illumination of HA in dimethylsulphoxide (DMSO) or DMSO-buffer (1:1 by volume, pH > 6.7) generated a strong electron paramagnetic resonance (EPR) signal. This EPR signal was intensified in the presence of reductants. The EPR spectrum obtaine