Experimental and Theoretical Investigation of Photo- dissociation on MgO(001)

MgO(001)光解离的实验和理论研究

• 批准号: 8800705
• 负责人: Peter Stair
• 金额: $ 35.41万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-15 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8800705&HistoricalAwards=false
• 关键词: Experimental; Theoretical; Investigation; Photo; dissociation

This grant, funded jointly by Special Projects in Chemistry and the Division of Materials Research provides support for the research of Profs. Stair and Weitz at Northwestern University. The objective of the research is to study, both experimentally and theoretically, the photodissociation dynamics of small molecules adsorbed on single-crystal insulator surfaces. Such information is of importance to the understanding of photochemistry at the gas-solid interface. In addition to studies of the adsorption and surface chemistry of the adsorbed molecular species, the experimental program will also focus on measurements of the angular distribution, the kinetic energy distribution and the rotational and vibrational distributions of the photodissociated fragments. The molecules to be studied were selected as representative examples of rapid direct and predissociative photodissociation mechanisms on the basis of gas phase photodissociation measurements. They also provide both atomic and molecular fragments that are amenable to high sensitivity detection as well as theoretical description. The magnesium oxide adsorbant surface was selected for its insulating properties,ease of handling and characterization and its chemical stability. Theoretical models to be developed will aim at calculating the experimentally measured fragment distributions.

这项资助由化学特别计划和材料研究部联合资助，为教授的研究提供支持。西北大学的Stair和Weitz说。本研究的目的是从实验和理论两方面研究吸附在单晶绝缘体表面的小分子光解动力学。这些信息对于理解气固界面的光化学具有重要意义。除了研究吸附分子种类的吸附和表面化学外，实验计划还将侧重于光解离碎片的角分布，动能分布以及旋转和振动分布的测量。在气相光解作用测量的基础上，选择待研究分子作为快速直接和预解离光解机制的代表性例子。他们还提供原子和分子片段，适用于高灵敏度检测以及理论描述。选择氧化镁吸附剂表面主要考虑其绝缘性能、易于处理和表征以及化学稳定性。将要开发的理论模型将旨在计算实验测量的碎片分布。