State-Resolved Photodissociation Dynamics of Polyatomic Free Radicals

多原子自由基的状态分辨光解离动力学

• 批准号: 0848643
• 负责人: Jingsong Zhang
• 金额: $ 41.66万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0848643&HistoricalAwards=false
• 关键词: State; Resolved; Photodissociation; Dynamics; Polyatomic

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Professor Jingsong Zhang of the University of California at Riverside will investigate the photochemistry of prototypical polyatomic free radicals in molecular beams. High resolution high-n Rydberg atom time-of-flight spectrometry (HRTOF) will be utilized to study spectroscopy and state-resolved photodissociation dynamics of reactive intermediates important in combustion and atmospheric chemistry. The systems to be studied include vinyl radical and vinylidene, formyl radical, and HOCO radical.The scientific issues to be examined include: (a) open-shell electronic states and potential energy surfaces, and their nonadiabatic interactions and influences on photodissociation dynamics; (b) detailed mechanisms involving complex nuclear rearrangements and competitive dissociation pathways of free radicals; and (c) free radical electronic structures, thermodynamics, and energetics. The research will also provide high-quality benchmarks for the theoretical chemistry and physics communities.A diversified group of graduate and undergraduate students at the University of California at Riverside will participate in this research. They will acquire knowledge and skills through the multi-disciplinary research activities. Faculty members and undergraduate students from California State University and local community colleges will participate in the research during the summer.

在这个项目中，由化学部实验性化学计划资助，加利福尼亚大学河滨分校的Jingsong Zhang教授将研究分子束的原型多原子自由基的光化学。高分辨率高N rydberg原子飞行时间光谱法（HRTOF）将用于研究对燃烧和大气化学重要重要的反应性中间体的状态分辨的反应性中间体的光解散动力学。要研究的系统包括乙烯基自由基和乙烯基，甲基自由基和Hoco自由基。要研究的科学问题包括：（a）开放式电子状态和势能表面，以及它们的非绝热相互作用以及对光消血动力学的影响； （b）涉及复杂核重排和自由基的竞争解离途径的详细机制； （c）自由基电子结构，热力学和能量学。这项研究还将为理论化学和物理社区提供高质量的基准。加利福尼亚大学河滨分校的多元化研究生和本科生将参加这项研究。他们将通过多学科研究活动获得知识和技能。来自加利福尼亚州立大学和当地社区学院的教职员工和本科生将在夏季参加研究。