Infrared Spectroscopy of Molecules on Metal Surfaces

金属表面分子的红外光谱

• 批准号: 9221687
• 负责人: Michael Trenary
• 金额: $ 39.7万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-01 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9221687&HistoricalAwards=false
• 关键词: Infrared; Spectroscopy; Molecules; Metal; Surfaces

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.

这项研究项目得到了分析和表面化学计划的支持，继续研究吸附在金属表面的分子的红外光谱。将对吸附在银、铜和铑表面的甲硫醚、甲氧基和乙叉基团进行详细的反射吸收红外光谱研究。所有这些体系都表现出费米共振效应，它将对称的C-H伸缩基态与甲基弯曲泛音耦合在一起，是吸附分子之间以及吸附分子与表面之间重要的物理相互作用的极好模型。这项工作建立的定量认识将在利用红外光谱研究表面化学方面具有广泛的适用性。广泛使用红外光谱来研究表面化学过程的机理是一种方法的发展，它提供了对许多重要的非均相体系的更多的了解。这一研究项目的目标是发展对吸附在表面的分子的红外光谱的详细知识，这将使红外能够继续用于监测表面反应。高分辨率红外光谱方法提供了丰富的信息，本研究项目的结果将对这些方法的发展和实施至关重要。