| ELECTRONIC SPECTRA OF HYPOCRELLIN A, B AND THEIR DERIVATIVES |
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| 作者姓名： | 第五振军 蒋丽金 张曼华 |
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| 作者单位： | Institute of Photographic Chemistry，Academia Sinica，Belling 100012，PRC，Institute of Photographic Chemistry，Academia Sinica，Belling 100012，PRC，Institute of Photographic Chemistry，Academia Sinica，Belling 100012，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： | In this paper, the electronic spectra of hypocrellin A and B (HA and HB) are studied in detail. It has been proved that their three visible absorption bands come respectively from the ππ transition of their conjugated systems and intramolecular proton transfer. In dilute solutions, their fluorescence spectra consist of the fluorescence peak of the neutral monomolecule and that of the zwitter-ions that are formed through proton transfer of excited states. In concentrated solution, the longer wavelength emission band is composed of the overlapped fluorescence peaks of zwitter-ions and excimers. The fluorescence spectra of the crystalline hypocrellin A and B consist of the fluorescence peaks of zwitter-ions and excimers and the fluorescence of neutral monomolecules could not be observed. Their relative intensities are closely related to the excitation wavelength.
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ELECTRONIC SPECTRA OF HYPOCRELLIN A, B AND THEIR DERIVATIVES |
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| DIWU ZHEN-JUN JIANG LI-JIN AND ZHANG MAN-HUA.ELECTRONIC SPECTRA OF HYPOCRELLIN A, B AND THEIR DERIVATIVES[J].Science in China(Chemistry),1990(1). |
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| Authors: | DIWU ZHEN-JUN JIANG LI-JIN AND ZHANG MAN-HUA |
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| Abstract: | |
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| Keywords: | hypocrellin A and B perylene quinone electronic spectrum |
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