| 厚朴酚在乙醇中的荧光自猝灭及猝灭机理 |
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| 引用本文： | 黎红梅,陈亚东,严拯宇,胡育筑.厚朴酚在乙醇中的荧光自猝灭及猝灭机理[J].物理化学学报,2007,23(9):1454-1458. |
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| 作者姓名： | 黎红梅 陈亚东 严拯宇 胡育筑 |
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| 作者单位： | Basic Science School, China Pharmaceutical University, Nanjing 210038, P. R. China |
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| 基金项目： | 中国药科大学校科研和教改项目 |
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| 摘 要： | 系统研究了厚朴酚的荧光光谱和吸收光谱随浓度的变化, 揭示了厚朴酚具有较强的自猝灭特性. 其猝灭包括静态和动态机制: 随着浓度增加, 厚朴酚发生聚集; 同时, 单体和聚集体对荧光的猝灭表现为动态猝灭, 由单体、二聚体、三聚体造成的荧光猝灭速率常数kqm、k qd、k qt值远大于扩散控制的荧光猝灭速率常数. 说明除扩散控制的短程能量转移引起的猝灭外, 厚朴酚还存在长程能量转移导致的猝灭机制.
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| 关 键 词： | 厚朴酚 荧光自猝灭 聚集 猝灭速率常数 |
| 收稿时间： | 2007-01-25 |
| 修稿时间： | 2007-01-25 |
Fluorescence Self-quenching and the Quenching Mechanism of Magnolol |
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| LI Hong-Mei,CHEN Ya-Dong,YAN Zheng-Yu,HU Yu-Zhu.Fluorescence Self-quenching and the Quenching Mechanism of Magnolol[J].Acta Physico-Chimica Sinica,2007,23(9):1454-1458. |
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| Authors: | LI Hong-Mei CHEN Ya-Dong YAN Zheng-Yu HU Yu-Zhu |
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| Institution: | Basic Science School, China Pharmaceutical University, Nanjing 210038, P. R. China |
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| Abstract: | The absorption and emission spectra of magnolol in ethanol were determined,and the fluorescence self- quenching characteristics,including static-quenching and dynamic-quenching,were revealed.Magnolol aggregation occurs with its concentration increases.On the other hand,the quenching rate constants produced by the monomer, dimmer,and trimer,k_(qm),k_(qd),and k_(qt),are much greater than those controlled by diffusion.It seems that other long-range energy migration should be taken into account besides the short-range electron exchange energy in the quenching mechanism. |
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| Keywords: | Magnolol Fluorescence self-quenching Aggregation Quenching rate constant |
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