State-Resolved Spectroscopy and Dynamics of Chemical Transients

状态分辨光谱和化学瞬态动力学

• 批准号: 0415849
• 负责人: David Nesbitt
• 金额: --
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-15 至 2007-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0415849&HistoricalAwards=false
• 关键词: State; Resolved; Spectroscopy; Dynamics; Chemical

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Prof. Nesbitt of the University of Colorado-Boulder will conduct a research program in molecular spectroscopy consisting of four parts. 1) Radicals and ions will be investigated by high-resolution molecular spectroscopy; 2) the technique of slit-jet supersonic high-resolution spectroscopy will be further developed to enable kinetic studies; 3) state-to-state reaction dynamics in prototypical 4-atom systems will be investigated with both crossed jet and slit jet expansion techniques; and 4) the folding dynamics of small self-folding RNA sequences will be investigated to determine how this process depends on the conditions and properties of the molecule. Specifically, in the first task the initial focus will be on the ethyl, isopropyl, and cyclopropyl radicals as well as on some longer carbon chain molecules found in the interstellar medium. The initial work on ions will concentrate on the H/D isotopically-substituted hydronium ion, as well as the protonated methane molecule. The second set of studies deals with reactions of hydrocarbon radicals with oxygen to form oxygenated alkyl radicals, while the third set will focus on the reactions of atoms with vibrationally excited water molecules. This research will be conducted with graduate and undergraduate students, including women, underrepresented minorities and Native Americans. These students will acquire knowledge and skills in preparation for advanced studies or entrance into the scientific/technical workforce.

在这个由化学系实验物理化学计划资助的项目中，科罗拉多大学博尔德分校的奈斯比特教授将进行一个由四个部分组成的分子光谱学研究计划。1)将用高分辨率分子光谱学研究自由基和离子；2)进一步发展缝隙喷射超音速高分辨率光谱学技术，以进行动力学研究；3)将用交叉喷射和狭缝喷射展开技术研究典型的四原子体系的态-态反应动力学；以及4)将研究小的自折叠RNA序列的折叠动力学，以确定这一过程如何依赖于分子的条件和性质。具体地说，在第一项任务中，最初的重点将是乙基、异丙基和环丙基，以及星际介质中发现的一些较长的碳链分子。关于离子的最初工作将集中在H/D同位素取代的氢离子，以及质子化的甲烷分子上。第二组研究涉及碳氢自由基与氧的反应生成含氧烷基自由基，而第三组研究将侧重于原子与振动激发的水分子的反应。这项研究将在研究生和本科生中进行，包括女性、未被充分代表的少数族裔和美洲原住民。这些学生将获得知识和技能，为深造或进入科学/技术工作大军做准备。