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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.
Using the femtosecond time-resolved fluorescence-loss spectroscopy technique, the ultrafast kinetics of oxazine 750 laser dye molecules in a typical alcoholic solvent has been studied. Two ultrafast kinetic processes have been investigated: the fast relaxation process at femtosecond order and Picosecond-order slow relaxation process.The rapid relaxation process is derived from intramolecular vibrational energy redistribution (IVR) and solvent molecule ultrafast inertial relaxation kinetics, whereas the slow relaxation process corresponds to solvated diffusion Molecular relaxation kinetics process.The experimental results show that the time constant of slow relaxation process increases with the increase of the hydrogen bond energy between alcohol solvent molecules.