Solvent Effects in Electron-Driven Chemistry of Adsorbed Halogenated Compounds

吸附卤代化合物电子驱动化学中的溶剂效应

• 批准号: 0315209
• 负责人: Theodore Madey
• 金额: --
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0315209&HistoricalAwards=false
• 关键词: Solvent; Effects; Electron; Driven; Chemistry

AbstractCHE-0315209Madey/RutgersWith the support of the Analytical and Surface Chemistry Program, Professor Madey and his coworkers in the Rutgers University Department of Physics and Astronomy are examining electron driven chemistry of halogenated molecules adsorbed on surfaces and in thin films of water, ammonia, and other species. Emphasis on the role of coadsorbed solvent molecules on mechanisms of reaction and rates of reaction are being examined. Time of flight electron stimulated desorption ion angular distribution (TOF-ESDIAD) measurements are used to characterized the electron stimulated desorption and dissociation processes for halogenated molecules in the presence of polar and non-polar solvent species in the condensed thin films. Fundamental mechanisms by which the coadsorbate influences electron induced reactions are examined. Information from these studies is useful for understanding mechanisms of ozone depletion and environmental remediation. Chemical reaction processes driven by electron irradiation are the focus of the research of Professor Madey and his coworkers. By measuring the angular distribution of ion products of electron irradiation of thin films and surfaces, information about the mechanisms of desorption and decomposition of adsorbed halogen containing species is obtained. This information is important in developing an understanding of environmental and atmospheric chemical processes involving halogen containing molecules.

在分析和表面化学计划的支持下，罗格斯大学物理和天文学系的Madey教授和他的同事们正在研究吸附在表面以及水、氨和其他物种的薄膜中的卤化分子的电子驱动化学。重点研究了共吸附的溶剂分子对反应机理和反应速率的作用。用飞行时间电子激发脱附离子角分布(TOF-ESDIAD)测量了凝聚薄膜中极性和非极性溶剂物种存在时卤化分子的电子激发脱附和解离过程。研究了共吸附物影响电子诱导反应的基本机理。来自这些研究的信息有助于理解臭氧消耗和环境修复的机制。电子辐照驱动的化学反应过程是Madey教授和他的同事们研究的重点。通过测量电子辐照薄膜和表面离子产物的角分布，获得了吸附的含卤素物种的脱附和分解机理的信息。这些信息对于发展对涉及含卤素分子的环境和大气化学过程的理解很重要。