Infrared Spectroscopy of Molecules on Metal Surfaces

这个研究项目，支持在分析和表面 化学计划，继续研究红外线 吸附在金属表面上的分子的光谱学。 详细 甲基的反射-吸收红外光谱研究 硫醇盐、甲氧基和乙炔部分吸附在 将进行银、铜和铑表面。 所有 这些系统的费米共振效应耦合 含甲基弯曲对称C-H伸缩基函数 泛音，并作为优秀的模型的重要 吸附物分子之间以及 吸附物和表面。 量化理解 本工作所开发的新技术具有广泛的应用前景 红外光谱仪来研究表面化学。 %%% 红外光谱法的广泛使用，以研究 表面化学过程的机理是一种方法 这一发展使人们对一个 一些重要的异构系统。 这个目标 研究项目是开发详细的知识， 吸附在表面的分子的红外光谱， 将继续使用红外线监测地表 反应. 高分辨率IR方法提供了丰富的 信息，该研究项目的结果将是 对发展和实施这些战略至关重要。 方法.

This research project, supported in the Analytical and Surface Chemistry Program, continues studies of the infrared spectroscopy of molecules adsorbed on metal surfaces. Detailed reflection-absorption infrared spectroscopic studies of methyl thiolate, methoxy, and ethylidyne moieties adsorbed on silver,copper, and rhodium surfaces will be carried out. All of these systems exhibit Fermi resonance effects which couple the symmetric C-H stretch fundamental with methyl bending overtones, and serve as excellent models of the important physical interactions between adsorbate molecules and between the adsorbate and the surface. The quantitative understanding developed in this work will have wide applicablility in the use of infrared spectroscopy to study surface chemistry. %%% The widespread use of infrared spectroscopy to study the mechanisms of surface chemical processes is a method development which has provided an increased understanding of a number of important heterogeneous systems. The goal of this research project is to develop the detailed knowledge of the infrared spectroscopy of molecules adsorbed at surfaces which will enable the continued use of infrared to monitor surface reactions. High resolution IR methods provide a wealth of information, and the results of this research project will be essential to the development and implementation of these methods.