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.

在这个由化学系物理化学计划资助的项目中，宾夕法尼亚大学的戴海龙将从事一项关于高度振动激发分子动力学的研究计划。 该项目将把关于非常高激发系统的详细弛豫机制和速率的工作扩展到低温，并将研究在相同高振动水平的更广泛动能范围内控制非弹性振转过程的基本原理。 第二组实验使用货车德瓦耳斯复合物来研究从高度振动激发的分子到附近的冷分子的能量转移，以深入了解不同的耦合机制、超级碰撞和在固定能量下激发的分子中的能量转移。 技术，如动力学量子拍光谱和时间分辨傅里叶变换发射光谱将被用来关联两种类型的实验的分子间和分子内的相互作用。 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的问题有关，如燃料的更有效燃烧和大气化学问题，如北极和南极臭氧洞的形成和破坏。