Chemical Dynamics of HOx Free Radicals and Slow H Atoms

HOx 自由基和慢氢原子的化学动力学

• 批准号: 0809651
• 负责人: Dudley Herschbach
• 金额: $ 46.8万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-12-15 至 2012-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0809651&HistoricalAwards=false
• 关键词: Chemical; Dynamics; HOx; Free; Radicals

In this award, funded by the Experimental Physical Chemistry Program of the Division of Chemistry, Professors Dudley Herschbach and Igor Lyuksyutov of Texas A & M University, together with their graduate student colleagues, will study the reactions of hydrogen atoms with molecules in crossed-beam experiments at ultra-low collision energies -- energies where the deBroglie wavelengths exceed 250 Å. Initial molecules to be studied will include halogens and nitrogen dioxide. In addition to these studies of reactions of ultra-slow chemical species, Herschbach and Lyuksyutov propose to conduct crossed-beams studies of a number of reactions involving atmospherically important HOx species. By carefully controlling the collision energies of reactions, experiments like those being conducted here reveal important details for how chemical reactions occur -- details that are lost when studying reactions under normal laboratory conditions. In addition, by slowing normally speedy reactant molecules (ca. 1000 mph) to "school-zone" speeds, extreme quantum effects will become dominant -- resulting in unique behavior. Profs. Herschbach and Lyuksyutov will continue to lead a number of high profile outreach projects, including television work and a summer school for high school students entitled the "Coolest Place in Texas."

在这个由化学系实验物理化学项目资助的奖项中，德克萨斯A & M大学的Dudley Herschbach教授和Igor Lyuksyutov教授，以及他们的研究生同事，将在超低碰撞能量（德布罗意波长超过250 Å的能量）的交叉束实验中研究氢原子与分子的反应。最初要研究的分子将包括卤素和二氧化氮。除了这些对超慢化学物质的反应的研究之外，Herschbach和Lyuksyutov建议对一些涉及大气中重要的HOx物质的反应进行交叉梁研究。通过仔细控制反应的碰撞能量，像这里进行的实验揭示了化学反应如何发生的重要细节——这些细节在正常实验室条件下研究反应时丢失了。此外，通过将通常快速的反应物分子（约1000英里/小时）减慢到“学校区”速度，极端量子效应将占据主导地位，从而导致独特的行为。教授。Herschbach和Lyuksyutov将继续领导一些高知名度的推广项目，包括电视工作和一个名为“德克萨斯州最酷的地方”的高中生暑期学校。