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Studies of Molecular Orientation and Conformation of Mixed Monolayers at Electrode Surfaces by Nonlinear Optics and Vibrational Spectroscopy

利用非线性光学和振动光谱研究电极表面混合单分子层的分子取向和构象

基本信息

批准号：
9001876
负责人：
Robert Corn
金额：
$ 29.5万
依托单位：
University of Wisconsin-Madison
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1990
资助国家：
美国
起止时间：
1990-05-01 至 1994-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9001876&HistoricalAwards=false
关键词：
Studies Molecular Orientation Conformation Mixed

项目摘要

This grant is in the general area of analytical and surface chemistry and in the subfield of laser spectroscopy of liquid solid interfaces. Professor Robert Corn will develop the theoretical and experimental description of monolayers of mixed molecular species at metal electrode interfaces. The second harmonic generation and sum frequency generation methods developed by Professor Corn will be combined with infrared spectroscopic measurements of mixed monolayers of molecular species controlled by electrochemical potential on a metal electrode. These studies will allow fuller understanding of the role of interfacial molecular structure on electron transfer processes which occur at these interfaces. In addition, the methodology will allow more complete description of other liquid solid interfaces of import in a variety of chemical and technological processes. By combining second harmonic generation (SHG) on and off resonance analysis and theoretical description of the response using Pople-Pariser-Parr formalism to describe the molecular polarizability tensors, the first measurements of molecular orientation response in SHG have been made. Professor Corn will extend these measurements in combination with infrared reflection absorption and sum frequency generation to fully characterize mixed monolayers of molecular species at single crystal electrode liquid interfaces.

这笔赠款是在分析和表面化学的一般领域，以及液-固界面的激光光谱学的子领域。罗伯特·科恩教授将对金属电极界面上混合分子物种的单分子膜进行理论和实验描述。Corn教授开发的二次谐波和和频产生方法将与金属电极上由电化学势控制的分子物种混合单分子膜的红外光谱测量相结合。这些研究将使人们能够更充分地了解界面分子结构对发生在这些界面上的电子转移过程的作用。此外，该方法将允许更完整地描述各种化学和工艺过程中进口的其他液-固界面。将二次谐波产生(SHG)的通断共振分析与用Pople-Pariser-Parr形式描述分子极化率张量的响应理论描述相结合，首次测量了SHG中分子的取向响应。康恩教授将把这些测量与红外反射吸收和和频产生相结合，以充分表征单晶电极液体界面上分子物种的混合单分子层。