Photoisomerization of Trans-Stilbene Adsorbed on Dielectric Surfaces

这项研究项目是在一个本科院校进行的，研究了吸附在单晶氧化铝表面的反式二苯乙烯的光异构化反应。在分析和表面化学计划的支持下，将能够使用程序升温脱附和偏振UV-Vis光谱对吸附分子进行表征。我们将考察惰性氙气隔离层对弧光灯诱导的光异构化的影响，以及吸附覆盖率、激发波长和表面温度等变量。对表面光催化异构化的详细机理进行了探讨。由于对光催化和光在电子材料加工中的应用感兴趣，表面的光诱导化学是一个不断扩大的研究领域。这里支持的工作通过考虑光诱导异构化的简单模型系统来解决这一一般领域的基本方面。通过考察一个已经在气相和溶液中得到很好研究的体系，应该会对表面中介过程有一个理解。

This research project, at an undergraduate institution, addresses the photoisomerization of trans-stilbene adsorbed on single crystal alumina surfaces. Support from the Analytical and Surface Chemistry Program will enable the characterization of adsorbed molecules using temperature programmed desorption and polarized UV- VIS spectroscopy. The effects of inert Xenon spacer layers on the arc lamp induced photoisomerization will be examined, as will variables such as adsorbate coverage, excitation wavelength, and surface temperature. The detailed mechanism of the surface mediated photoisomerization will be explored. Photoinduced chemistry on surfaces is an expanding area of research due to interest in photocatalysis and the use of light for electronic materials processing. The work supported here addresses basic aspects of this general area, by considering the simple model system of light induced isomerization. By examining a system which has been well studied in the gas phase and in solution, an understanding of the surface mediated process should emerge.