| 飞秒荧光亏蚀光谱技术研究液相体系取向弛豫 |
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| 引用本文： | 刘建勇,范文慧,韩克利,徐大力,楼南泉.飞秒荧光亏蚀光谱技术研究液相体系取向弛豫[J].化学物理学报(中文版),2003,16(3):161-162. |
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| 作者姓名： | 刘建勇 范文慧 韩克利 徐大力 楼南泉 |
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| 作者单位： | 中国科学院大连化学物理研究所,分子反应动力学国家重点实验室,大连,116023 |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程项目 |
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| 摘 要： | 溶液中分子的快速弛豫过程直接反映了溶液中溶质和周围溶剂分子间的相互作用1-3]．在液相体系中分子取向通常是随机分布的．当溶质分子被线偏振光激发至激发态时，其分子取向将由原来各向同性的球形分布瞬间变成各向异性的椭球分布．由于溶质分子周围大量溶剂分子的存在，通过二者之间相互作用，激发态溶质分子在一定方向上的取向优势将很快弛豫掉．这种溶液中的取向弛豫过程通常是几个到几百皮秒1-3]．
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| 关 键 词： | 取向弛豫 激光染料 飞秒激光 荧光亏蚀光谱 |
The Study of Orientational Relaxation in Solution Using Femtosecond Time-resolved Fluorescence Depletion Spectroscopy |
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| Liu Jianyong,Fan Wenhui,Han Keli,Xu Dali,Lou Nanquan.The Study of Orientational Relaxation in Solution Using Femtosecond Time-resolved Fluorescence Depletion Spectroscopy[J].化学物理学报(中文版),2003,16(3):161-162. |
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| Authors: | Liu Jianyong Fan Wenhui Han Keli Xu Dali Lou Nanquan |
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| Abstract: | Femtosecond time-resolved fluorescence depletion spectroscopywas used in the study of the orientation relaxation of Rhodamine 700(LD700) and Oxazine 750(OX750) in DMSO. The anisotropy functions of the dye molecules were obtained fromthe fluorescence depletion spectra, as the polarization of probe pulse is parallel and perpendicular respectively. The results showthatthe transition dipole momentof the pump and the probe ofLD700 and OX750 are parallel. The time constants of the orientation relaxation of these dye molecules in DMSO are 1.8 and 1.9 ps for LD700 and OX750, respectively. |
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| Keywords: | Orientational relaxation Laser dye Femtosecond laser Fluorescence depletion spectroscopy |
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