Spectroscopic Studies of Structures and Defect Activities of Icy Clusters and Thin Films

在这个项目中的实验物理化学计划的 俄克拉荷马州州立大学的化学系保罗·德夫林将使用 振动光谱，以表征分子的行为， 各种水冰形式的表面，包括立方冰，无定形冰， 酸水合物和笼形水合物。 拟议工作的一个重点是 在表面上的“悬挂”氢键的行为，以及 各种吸附的小分子。 目标吸附物 包括H2、CO2、SO3、HCl、乙炔、苯以及CO和N2。 的性质 冰中的结构缺陷及其在性能和 还将研究冰和笼形物的相变。 德夫林将与一位理论家合作， 实验数据，以了解更多关于吸附过程。 该项目部分涉及对过程的基本实验室研究 这些都发生在冰面上，其中许多都涉及到自然界中的 目前相当感兴趣的现象。 这其中包括 臭氧层空洞的形成、酸性物质的产生、 雨和烟雾。 此外，这些实验将有助于阐明 天体物理学感兴趣的领域作为形成的机制 星际空间中的分子和彗星尾巴的组成。

In this project in the Experimental Physical Chemistry program of the Chemistry Division Paul Devlin of Oklahoma State University will use vibrational spectroscopy to characterize molecular behavior at the surface of various water ice forms including cubic ice, amorphous ice, acid hydrates, and clathrate hydrates. One focus of the proposed work is on the behavior of "dangling" hydrogen bonds at the surfaces as well as of various types of adsorbed small molecules. Adsorbates of interest include H2, CO2, SO3, HCl, ethyne, benzene, and CO and N2. The nature of structural defects in ice and their importance in the properties and phase transitions of ice and clathrates will also be investigated. Devlin will collaborate with a theoretician who will simulate his experimental data in order to learn more about the adsorption process. This project entails in part a fundamental laboratory study of processes which take place on ice surfaces, many of which are involved in natural phenomena of considerable current interest. Among these are the environmentally urgent issues of the formation of the ozone hole, acid rain, and smog. In addition, these experiments will help elucidate such areas of astrophysical interest as the mechanism of the formation of molecules in interstellar space and the composition of cometary tails.