U.S.-Federal Republic of Germany Cooperative Research on Van der Waals Complexes, Laser-stimulated Desorption and Multi-photon Ionization

美德合作研究范德华配合物、激光刺激解吸和多光子电离

• 批准号: 8722107
• 负责人: Sheng Lin
• 金额: $ 1.6万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-15 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8722107&HistoricalAwards=false
• 关键词: U.S.; Federal; Republic; Germany; Cooperative

This award supports Professor Sheng Hsien Lin of Arizona State University for several short term visits to collaborate with Prof. E. W. Schlag of the Technical University of Munich. They are studying the mechanisms of laser-stimulated desorption or vaporization of adsorbed molecules from solid surfaces, using both infrared and ultraviolet-visible lasers. They plan to continue their investigation of spectral shifts and electronic relaxation of van der Waals complexes. In addition, they will study the spectroscopic properties and dynamical processes of benzene and other dimers and the photoisomerization of an aromatic molecule embedded in a cluster as a function of cluster size. They will also carry out a theoretical study of photoionization threshold spectroscopy on van der Waals clusters to show that this leads to more accurate determination of ionization potential and provides information on the structure and vibrational frequencies of the cluster. Professor Lin is carrying out state of the art theoretical research on problems of great current interest in chemistry - studies of laser-stimulated vaporization of molecules from surfaces and of the spectral properties of van der Waals complexes. Such work requires input from experiments. Collaboration with Dr. Schlag and his outstanding group of experimentalists provides this very necessary interaction. Their prior collaboration has produced a number of significant contributions. Current plans for further collaboration promise valuable new insights into the processes that take place in a molecule after it has absorbed energy from light.

该奖项支持亚利桑那州立大学的Sheng Hsien Lin教授短期访问，与慕尼黑技术大学的E. W. Schlag教授合作。 他们使用红外线和紫外线激光研究了从固体表面吸附的分子的激光刺激解吸或蒸发的机制。 他们计划继续研究范德华复合物的光谱变化和电子松弛。 此外，他们还将研究苯和其他二聚体的光谱特性和动力学过程，以及嵌入簇中的芳香族分子的光异构化作为簇大小的函数。 他们还将对范德华簇上的光电离阈值光谱进行理论研究，以表明这会导致更准确地确定电离电位，并提供有关集群的结构和振动频率的信息。 林教授正在对当前对化学兴趣的问题进行最新的理论研究 - 对分子从表面和范德华复合物的光谱特性的激光刺激的蒸发研究进行研究。 这样的工作需要实验的输入。 与Schlag博士及其出色的实验家的合作提供了这种非常必要的互动。 他们先前的合作产生了许多贡献。 当前的进一步协作计划有价值的新见解对分子吸收了光中的能量后在分子中发生的过程。