Picosecond Rotational Diffusion Studies Using Time-Resolved and Phase-Resolved Spectroscopy

使用时间分辨和相位分辨光谱进行皮秒旋转扩散研究

• 批准号: 8814602
• 负责人: Mary Wirth
• 金额: $ 25.65万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-11-01 至 1992-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814602&HistoricalAwards=false
• 关键词: Picosecond; Rotational; Diffusion; Studies; Using

This project is in the general area of Analytical and Surface Chemistry and in the subfields of molecular spectroscopy and separations science. The thrust of this experimental program,under the direction of Professor Mary Wirth of the University of Delaware, focuses on the applications of molecular reorientation measurements to the field of analytical chemistry. The overall goal of the research is to determine the amount of solute geometry information that can be obtained by quantitative measurements of rotational diffusion parameters. This goal will be achieved by studying 1) solutes that are very similar in structure to one another, e.g. isomers, 2)large polynuclear aromatic hydrocarbons suspected of changing conformation in strong chromatographic solvents, 3)solute attachment to micelles and to silica surfaces, and 4) solute/solvent systems having poorly understood solvation interactions. The research proposed here will be used to examine the rotation of various molecules in different solvents. Lasers will be used as probes to measure this rotation as well as the interaction of these molecules with the various solvents. Molecules that are very similar in structure as well as large organic molecules composed of carbon and hydrogen will be used in this study. The results of these studies may be used to predict the separation of similar molecules in liquid chromatography.

该项目属于分析和曲面的常规领域 化学和分子光谱学的子领域， 分离科学这个实验的主旨是 该计划，根据教授的指导下，玛丽沃思的 特拉华州大学，专注于应用 分子再取向测量到分析领域 化学.研究的总体目标是确定 可以通过以下方式获得的溶质几何形状信息量 旋转扩散参数的定量测量。 这一目标将通过研究以下溶质来实现： 在结构上彼此相似，例如异构体，2）大的 多环芳烃被怀疑 在强色谱溶剂中的构象，3）溶质 与胶束和二氧化硅表面的附着，以及4） 溶剂化作用知之甚少的溶质/溶剂系统 交互. 这里提出的研究将用于检查旋转 在不同溶剂中的不同分子。将使用激光 作为探测器来测量旋转和相互作用 这些分子与各种溶剂的反应。的分子 在结构上非常相似， 由碳和氢组成的分子将被用于这一领域。 study.这些研究的结果可以用来预测 液相色谱法中相似分子的分离。