| PHOTOCHEMISTRY OF HYPOCRELLIN A (Ⅶ)——PHOTO-INDUCED ONE-ELECTRON REDUCTION OF HYPOCRELLIN PIGMENTS |
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| 作者姓名： | 安静仪 赵开弘 蒋丽金 |
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| 作者单位： | Institute of Photographic Chemistry，Academia Sinica，Beijing 100101，PRC，Institute of Photographic Chemistry，Academia Sinica，Beijing 100101，PRC，Institute of Photographic Chemistry，Academia Sinica，Beijing 100101，PRC |
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| 基金项目： | Project supported by the National Natural Science Foundation of China. |
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| 摘 要： | The photo-induced one-electron reduction of hypocrellin A (abbreviated as HA) and hy-pocrellin B (abbreviated as HB) in the presence of cysteine or ascorbic acid has been studied in this paper. The semiquinone radical anions of HA and HB obtained from the photo-reduction of HA and HB respectively, and the following protonation and disproportionation of these radical anions were detected via the ESR and UV-Vis spectra. Through comparison of their UV-Vis spectra with those of the chemically synthesized compounds of similar structures, it has been suggested that the metastable products formed after the acceptance of net two electrons and two protons in the photoreduction of HA and HB were tetrahydroxyl-per-ylene derivatives.
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