Chemical Physics of Model Two-Dimensional Systems

在这个实验物理化学项目中，乔治 位于布卢明顿的印第安纳州大学的尤因将研究光谱学， 吸附的双原子和多原子分子的动力学和反应性 离子绝缘体表面。 红外光谱技术将是 用于探索分子结构和运动，能量传递 吸附层和基底之间的机制，以及 吸附层和吸附层与基底之间。 使用脉冲紫外线 激光激发，表面上的光化学反应将 引发并通过荧光监测。 待调查的系统 包括氢、二氧化硫和甲烷 氯化物和溴化钾。 这项研究的一个主要目标是影响当前单层光化学的理论模型， 能量转移，观察和理解化学反应， 是地表环境所独有的 表面可以以多种方式影响化学反应，包括 能量转移到表面或从表面转移，改变化学物质的强度 键，并改变化学反应的能量。 教授 尤因的工作将澄清一些涉及能量学和 在相对惰性的底物如氯化钠上的化学反应 和溴化钾。对这些系统的研究也将有助于 我们对更复杂系统的理论理解。

In this project in the Experimental Physical Chemistry Program, George Ewing of Indiana University, Bloomington, will study the spectroscopy, dynamics, and reactivities of diatomic and polyatomic molecules adsorbed on ionic insulator surfaces. Infrared spectroscopic techniques will be used to explore molecular structures and motions, energy transfer mechanisms between the adlayer and the substrate, and bonding within the adlayer and between the adlayer and substrate. Using pulsed ultraviolet laser excitation, photochemical reactions on the surface will be initiated and monitored by fluorescence. Systems to be investigated include hydrogen, sulfur dioxide, and methane on lithium fluoride, sodium chloride, and potassium bromide. A major objective of this research is to influence current theoretical models of monolayer photochemistry and energy transfer, and to observe and understand chemical reactions which are unique to surface environments. Surfaces can influence chemical reactions in a variety of ways, including energy transfer to or from the surface, changing the strength of chemical bonds, and altering the energetics of chemical reactions. Professor Ewing's work will clarify some of the issues involving energetics and chemical reactions on relatively inert substrates such as sodium chloride and potassium bromide. The study of these systems will also contribute to our theoretical understanding of more complex systems.