| 噁嗪750激光染料分子在醇类溶剂中超快动力学研究 |
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| 引用本文： | 周立川,刘建勇,石英,赵广久,韩克利.噁嗪750激光染料分子在醇类溶剂中超快动力学研究[J].原子与分子物理学报,2007,24(2):431-434. |
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| 作者姓名： | 周立川 刘建勇 石英 赵广久 韩克利 |
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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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| 摘 要： | 利用飞秒时间分辨荧光亏蚀光谱技术,研究了噁嗪750激光染料分子在典型的醇类溶剂中超快动力学过程.实验发现两个超快动力学过程:飞秒量级的快速弛豫过程和皮秒量级的慢速弛豫过程.快速弛豫过程来源于分子内振动能量再分配(IVR)和溶剂分子超快惯性弛豫动力学过程,而慢速弛豫过程对应于溶剂化的扩散分子弛豫动力学过程.实验结果表明慢速弛豫过程的时间常数随醇溶剂分子间氢键键能的增强而增大.
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| 关 键 词： | 分子反应动力学 分子内振动能量再分配 溶剂化 飞秒时间分辨荧光亏蚀光谱 噁嗪750激光染料分子 |
| 文章编号： | 1000-0364（2007）02-0431-04 |
| 收稿时间： | 2006/12/10 |
| 修稿时间： | 2006-12-10 |
The ultrafast dynamics of Oxazine 750 dye in alcoholic solvents |
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| ZHOU Li-chuan,LIU Jian-yong,SHI Ying,ZHAO Guang-jiu,HAN Ke-li.The ultrafast dynamics of Oxazine 750 dye in alcoholic solvents[J].Journal of Atomic and Molecular Physics,2007,24(2):431-434. |
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| Authors: | ZHOU Li-chuan LIU Jian-yong SHI Ying ZHAO Guang-jiu HAN Ke-li |
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| Institution: | State Key Lab of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China |
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| Abstract: | The ultrafast dynamics of Oxazine 750 dye has been studied in the typical alcoholic solvents by using the femtosecond time-resolved stimulated emission pumping fluorescence depletion(FS TR SEP FD) technique.The faster decays on the hundreds of the femtosecond time scale and the slower decays on the order of picosecond are found.The intramolecular vibrational redistribution(IVR) and the ultrafast solvent inertial relaxation should account for the faster decay,while the slower decay is attributed to the diffusive solvent relaxation.The time constants of the slower decays are found to increase with the hydrogen-bonding energy in alcoholic solvents. |
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| Keywords: | molecular reaction dynamics intramolecular vibrational redistribution salvation femtosecond time-resolved stimulated emission pumping fluorescence depletion technique oxazine 750 dye |
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