Spectroscopy and Excited State Dynamics of Complexes of Dihydrogen and Methane with Metal Atoms

二氢和甲烷与金属原子配合物的光谱学和激发态动力学

• 批准号: 9215335
• 负责人: William Breckenridge
• 金额: $ 34.3万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215335&HistoricalAwards=false
• 关键词: Spectroscopy; Excited; State; Dynamics; Complexes

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Breckenridge of the University of Utah will study the spectroscopy and excited-state dynamics of metal/reactant systems using the "half-collision" approach of dissociating van der Waals molecules. Metals to be examined include Na, Al, and Cr, while the reactants are molecular hydrogen, H2, and methane, CH4. The metal atoms are created by laser ablation and are "gently" attached to the reactants by expanding through a supersonic jet to form the one-to-one van der Waals complexes. The complexes can be excited to initial states selected for orbital alignment and initial geometry. Detection is by laser-induced fluorescence and resonant multi- photon ionization. %%% In this project Prof. Breckenridge forms a loosely bound cluster of a metal atom and a molecular partner with which the metal can react. He energizes the cluster using laser light and follows the products from the resulting breakup of the cluster. By varying the wavelength of the exciting light, specific reaction paths of the excited metal atoms and reagents can be specified, which in turn allows Breckenridge to determine the effect of different types of excitation on the course of a chemical reaction.

在这个实验物理化学项目中， 化学系的一名教授， 犹他州将研究 使用"半碰撞"方法的金属/反应物系统， 解离货车范德华分子。 待检金属 包括Na、Al和Cr，而反应物是分子 氢气H2和甲烷CH4 金属原子是由 激光烧蚀，并"轻轻地"附着在反应物上， 通过超音速喷气机膨胀形成一对一的货车 der Waals复合体 该配合物可以被激发到初始 选定用于轨道调整和初始几何形状的国家。 检测是通过激光诱导荧光和共振多- 光子电离 %%% 在这个项目中，布雷肯里奇教授形成了一个松散的约束， 一个金属原子和一个分子伴侣的簇， 金属可以反应。 他用激光为星团提供能量 并遵循由此产生的分裂的产物， 集群 通过改变激发光的波长， 激发态金属原子和试剂的特定反应路径 可以指定，这反过来又允许布雷肯里奇 确定不同类型的激励对 化学反应的过程。