Charge Distribution in Photoexcited Molecules

光激发分子中的电荷分布

• 批准号: 8805577
• 负责人: Laren Tolbert
• 金额: $ 22.25万
• 依托单位: Georgia Tech Research Corporation - GA Tech Research Institute
• 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: 1988-06-01 至 1991-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8805577&HistoricalAwards=false
• 关键词: Charge; Distribution; Photoexcited; Molecules

This grant in Organic and Macromolecular Chemistry provides support for the research of Dr. Laren Tolbert, Georgia Institute of Technology. The work focuses on fundamental aspects of the acid-base properties of organic molecules. Acid-base relationships and their understanding are at the core of all reaction chemistry, controlling the most fundamental of interactions between molecules. Certain organic molecules are predicted to be extremely strong acids when placed in the excited state, yet exhibit no measurable indication of that acidity through rapid proton transfer. The principles governing this sluggish behavior will be studied in detail. Molecules which exhibit kinetic as well as thermodynamic acidity will also be studied. Techniques to be utilized include semiempirical molecular orbital calculations, steady-state and time resolved emission and absorption measurements, photoproduct analysis, and synthetic methods development. Possible applications include better substrates for "pH jump" experiments and useful photoinitators for cationic polymerizations.

这项有机和高分子化学方面的拨款为佐治亚理工学院拉伦·托尔伯特博士的研究提供了支持。这项工作的重点是有机分子酸碱性质的基本方面。酸碱关系及其理解是所有反应化学的核心，控制着分子间最基本的相互作用。某些有机分子在处于激发态时被预测为极强的酸，但通过快速的质子转移却没有表现出可测量的酸性。我们将详细研究这种迟缓行为的原理。表现出动力学和热力学酸性的分子也将被研究。可利用的技术包括半经验分子轨道计算、稳态和时间分辨发射和吸收测量、光产物分析和合成方法开发。可能的应用包括用于“pH跳跃”实验的更好的底物和用于阳离子聚合的有用的光引发剂。