| 二烷氨基香豆素在烯烃和聚合物中的荧光行为 |
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| 引用本文： | 何宜 张卫红. 二烷氨基香豆素在烯烃和聚合物中的荧光行为[J]. 中山大学学报(自然科学版), 1989, 28(4): 32-36 |
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| 作者姓名： | 何宜 张卫红 |
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| 作者单位： | 中山大学高分子研究所，中山大学高分子研究所，中山大学测试中心 |
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| 基金项目： | 中山大学科研基金资助项目 |
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| 摘 要： | 7-二乙氨基-4-甲基香豆素(DAMC)在液态烯烃和固态聚合物介质中的激发(吸收)波长和发射波长随介质的极性增大而红移。DAMC在聚合物介质中荧光量子产率和荧光寿命决定于介质的极性,辐射失活速率常数与非辐射失活速率常数也与此相关。处在单线激发态的DAMC与活泼烯烃会发生化学反应。据此说明DAMC的单线激发态构型为扭动两性离子是合理的。
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| 关 键 词： | 7-二乙氨基-4-甲基香豆素 荧光量子产率 荧光寿命 失活速率常数 |
The Fluorescence Behavior of Dialkylaminocoumarin in Alkenes and Polymers |
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| He Yi,Zhang Weihong,Lian Zhaoxi Institute of Polymer Science. The Fluorescence Behavior of Dialkylaminocoumarin in Alkenes and Polymers[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 1989, 28(4): 32-36 |
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| Authors: | He Yi Zhang Weihong Lian Zhaoxi Institute of Polymer Science |
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| Affiliation: | He Yi;Zhang Weihong;Lian Zhaoxi Institute of Polymer Science |
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| Abstract: | Either in media of liquid allenes or in solid polymers, the excitation(absorp- tion) and emission wavelength of 7-diethylamino-4-methylcoumarin (DAMC) are bathochromic with the polarity of media. The fluorescence quantum yields and lifetimes, and radiative and non-radiative decay rate constants are depended on the polarity of vinyl polymers. It has been found that there are chemical reaction between the excited DAMC and the active vinyl monomers. It further reveals that the conformation of the excited DAMC is in twisted zwitterionic state. |
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| Keywords: | 7-diethylamino-4-methylcoumarin fluorescence quantum yields fluorescence lifetimes decay rate constants |
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