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.

在化学部的物理化学计划资助的该项目中，宾夕法尼亚大学的Hai-Lung Dai将探讨有关高度振动激发分子动力学的研究计划。 该项目将把非常激发系统的详细放松机制和速率扩展到低温，并将研究跨相同高振动水平的更广泛的动力学能源状态的基本原理。 第二组实验使用范德华复合物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激发的分子中的能量转移。 动力学量子BEAT光谱和时间分辨傅里叶变换发射光谱等技术将用于将两种实验的分子间和分子内相互作用相关联。 这项工作将有助于理解各种碰撞现象，例如成核和低温反应动态。 因此，这项工作与社会问题有关，例如燃料的更有效燃烧以及大气化学中的问题，例如北极和南极臭氧孔的形成和破坏。