Inter- and Intra-Molecular Dynamics of Highly Vibrationally Excited Molecules

高振动激发分子的分子间和分子内动力学

• 批准号: 0111520
• 负责人: Hai-Lung Dai
• 金额: --
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0111520&HistoricalAwards=false
• 关键词: Inter; Intra; Molecular; Dynamics; Highly

In this project funded by the Physical Chemistry Program of the Chemistry Division, Hai-Lung Dai of the University of Pennsylvania will pursue a program of research on the dynamics of highly vibrationally excited molecules. This project will extend work on the detailed relaxation mechanisms and rates of very highly excited systems to low temperature and will investigate the underlying principles governing inelastic rovibrational processes across a broader kinetic energy regime of the same high vibrational level. A second set of experiments uses van der Waals complexes to study energy transfer from a highly vibrationally excited molecule to a nearby cold molecule to gain insight into different coupling mechanisms, super collisions, and energy transfer in molecules excited at fixed energies. Techniques such as kinetic quantum beat spectroscopy and time-resolved Fourier transform emission spectroscopy will be used to correlate the inter- and intra-molecular interactions for both types of experiment. This work will assist in understanding a wide variety of collisional phenomena, such as nucleation and low temperature reaction dynamics. As such, this work has relevance to societal concerns such as more efficient combustion of fuels and problems in atmospheric chemistry such as the formation and destruction of the Arctic and Antarctic ozone holes.

美国宾夕法尼亚大学戴海龙教授将在化学学部物理化学项目资助下，对高振动激发分子的动力学进行研究。该项目将扩展对低温下非常高激发系统的详细松弛机制和速率的研究，并将研究在相同高振动水平的更广泛的动能范围内控制非弹性旋转振动过程的基本原理。第二组实验利用范德华络合物研究从高振动激发分子到附近冷分子的能量转移，以深入了解不同的耦合机制、超级碰撞和固定能量激发分子的能量转移。动力学量子热光谱和时间分辨傅立叶变换发射光谱等技术将用于关联这两种类型实验的分子间和分子内相互作用。这项工作将有助于理解各种各样的碰撞现象，如成核和低温反应动力学。因此，这项工作与社会关注相关，例如燃料的更有效燃烧和大气化学问题，例如北极和南极臭氧空洞的形成和破坏。