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

这项赠款由化学特别项目和 材料研究部为以下项目提供支持： 教授的研究。Stair和Weitz在西北大学。 研究的目的是研究，无论是实验 从理论上讲， 分子吸附在单晶绝缘体表面。等 信息对于理解 气固界面的光化学 除了吸附和表面化学的研究外， 吸附的分子物种，实验程序 也将集中在角分布的测量上， 动能分布和旋转， 光解离碎片的振动分布。 选择待研究的分子作为代表 快速直接和预离解光离解的例子 气相光解离机理 测量. 它们还提供原子和分子 适合于高灵敏度检测的片段， 以及理论描述。氧化镁吸附剂 选择表面是因为它的绝缘性能， 处理和表征及其化学稳定性。 有待开发的理论模型将旨在计算 实验测量的碎片分布。

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.