| 伴随着分子内电荷分离的分子内转动模型的时间分辨荧光光谱研究 |
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| 引用本文： | 戚继发,修光宇,郭础.伴随着分子内电荷分离的分子内转动模型的时间分辨荧光光谱研究[J].光子学报,1991,20(1):114-119. |
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| 作者姓名： | 戚继发 修光宇 郭础 |
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| 作者单位： | 北京理工大学应用物理系
(戚继发，修光宇)，北京理工大学应用物理系(郭础) |
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| 摘 要： | 本文采用时间分辨荧光光谱方法,考查了两种7-胺基香豆类素衍生物分子在不同溶剂中的荧光辐射弛豫过程,研究了环境因素对伴随着分子内电荷转移的分子内转动激发态(TICT)弛豫过程的影响。结果说明TICT态是非刚性香豆素分子激发态无辐射弛豫路径之一,这一过程受到环境介质的极性、粘度和温度的影响。并指出了在考虑粘度影响时,须对DSE理论进行修正,同时提出了TICT态存在位垒的观点。
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| 关 键 词： | 时间分辨荧光光谱 荧光寿命 溶剂效应 TICT 香豆素 |
TIME-RESOLVED SPECTROSCOPY STUDY ON THE MODEL OF INTRAMOLECULAR ROTATION WITH INTRAMOLECULAR CHARGE SEPARATION |
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| Qi Jifa Xiu Guangyu Guo chu.TIME-RESOLVED SPECTROSCOPY STUDY ON THE MODEL OF INTRAMOLECULAR ROTATION WITH INTRAMOLECULAR CHARGE SEPARATION[J].Acta Photonica Sinica,1991,20(1):114-119. |
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| Authors: | Qi Jifa Xiu Guangyu Guo chu |
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| Institution: | Qi Jifa Xiu Guangyu Guo chuDepartment of Applied Physics,Beijing Institute of Technology |
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| Abstract: | The flurescent decay dynamics of two kinds 7-aminocoumarin derivative molecu-lars in different solvents was investigated by the time-resolved spectroscopy. The environmental effects on the relaxation of the intramolecular rotation with intramolecular charge transfer excited state (TICT) were studied. The results show that TICT is a nonrediative relaxation channel of the excited state of coumarin molecular with unrigid structure, and it was inflenced by the environmental properties (polarity, viscosity and temperature), we found that the Debye-Stokes-Einstein theory needed modifying to a energy barrier of TICT state which is intramolecular and senvironrnents dependent. |
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| Keywords: | Time-resolved flurescent spectroscopy Flurescent lifetime Solvent effect TICT Coumarin |
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