CAREER: Structure and Dynamics of Negative Ions via Photoelectron Imaging Spectroscopy

职业：通过光电子成像光谱研究负离子的结构和动力学

• 批准号: 0134631
• 负责人: Andrei Sanov
• 金额: $ 43.5万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0134631&HistoricalAwards=false
• 关键词: CAREER; Structure; Dynamics; Negative; Ions

In this project funded by the Experimental Physical Chemistry Program of the Chemistry Division, Sanov will combine femtosecond spectroscopy with photoelectron imaging to monitor the evolution of molecular orbitals in the course of chemical reactions. The initial systems to be studied include isolated and hydrated sulfur-containing molecular anions, and cluster anions. These are chosen for their practical importance and for serving as prototypes for the development of the new methodology. Photodissociation and unimolecular decomposition, dynamics at conical intersections, microscopic solvation, wave packet evolution, and bimolecular reactions in ionic clusters will be investigated. The results of this research will find immediate application in modeling the structure and dynamics of negative ions and solutions. Many important chemical processes involve ionic reactions, and the reactivity is affected strongly by interactions with the environment. In this research cluster ions are used as model micro-solutions for the studies of elementary processes relevant to biological and environmental chemistry. The results will provide insight into how the intermolecular interactions affect the behavior of electrons and chemical bonding. Photoelectron imaging experiments will be incorporated in the undergraduate Physical Chemistry program as a way of providing the students with hands-on research experience. A fast-track Internet-based mechanism for publishing the results of student research will be developed. Students will be trained in research techniques in preparation for advanced studies and for entry into the scientific/technical workforce.

在该项目由化学划分实验性化学计划资助的项目中，Sanov将将飞秒光谱与光电子成像结合起来，以监测化学反应过程中分子轨道的演变。要研究的初始系统包括分离的和水合的含硫分子阴离子和簇阴离子。这些是因为它们的实际重要性和作为开发新方法的原型的实际重要性。将研究在离子簇中的光解离和单分子分解，圆锥形交叉点的动力学，微观溶剂化，波数据包演化和双分子反应。 这项研究的结果将立即在建模负离子和解决方案的结构和动力学时立即应用。许多重要的化学过程涉及离子反应，并且与环境的相互作用对反应性的影响很大。 在本研究中，群集离子用作模型微分辨率，用于研究与生物和环境化学相关的基本过程。结果将提供有关分子间相互作用如何影响电子和化学键合的洞察力。光电子成像实验将纳入本科生化学计划中，以便为学生提供动手研究经验。 将开发出一种基于Internet的快速互联网机制，用于发布学生研究结果。学生将接受研究技术的培训，以准备高级研究并进入科学/技术劳动力。