Potential Energy Surfaces and Internal Dynamics of Weakly Bound Systems

弱束缚系统的势能面和内部动力学

• 批准号: 8807895
• 负责人: Kenneth Leopold
• 金额: $ 21.95万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-11-01 至 1992-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8807895&HistoricalAwards=false
• 关键词: Potential; Energy; Surfaces; Internal; Dynamics

Dr. Kenneth Leopold is supported by a grant from The Experimental Physical Chemistry Program to perform studies on the structures and large amplitude motions of weakly bound van der Waals complexes and metal clusters. Dr. Leopold will use a new state-of-the-art far infrared technology to study the vibrational properties of these clusters. This very high resolution spectroscopic information is not available through any other experimental approach. State-of-the-art far infrared technology featuring high sensitivity, high resolution, and complete coverage throughout the far infrared region will be combined with established methods of supersonic jet expansions to study the low frequency vibrational spectra of a wide variety of van der Waals species. This work is distinct from the majority of other studies on van der Waals complexes in that it involves direct excitation of the soft intermolecular vibrations, and is made possible by a new technique in which tunable far infrared radiation is generated from the difference frequency between two carbon dioxide lasers. The results will be crucial to the testing and development of new theoretical methods for computing intermolecular potential surfaces and for treating the problem of large amplitude motion in molecules. In addition, the examination of rotationally resolved vibrational spectra of metal trimers will provide high quality information regarding the structure, vibrational frequencies, and barrier heights to pseudorotation in these species.

肯尼斯·利奥波德博士得到了 实验物理化学计划，以进行研究 弱束缚货车的结构和大振幅运动 der Waals络合物和金属簇合物。 利奥波德博士将使用 最先进的远红外技术， 这些集群的振动特性。 这一非常高 分辨率光谱信息无法通过 其他实验方法。 先进的远红外技术， 高灵敏度、高分辨率和全面覆盖 远红外区域将与已建立的 研究低频的超音速射流膨胀方法 各种各样的货车范德华物种的振动光谱。 这项工作是不同于大多数其他研究货车 德尔瓦尔斯复合物，因为它涉及直接激发 软分子间的振动，并使之成为可能， 一种新技术，其中可调谐远红外辐射是 产生于两个碳原子之间的频率差 二氧化物激光器 结果对测试至关重要， 发展新的理论计算方法 分子间势能面和处理这个问题 分子的大幅度运动 此外该 旋转分辨振动光谱的检验 金属三聚体将提供关于 结构、振动频率和势垒高度， 在这些物种中，