Achieving Selectivity in a Chemical Reaction Process Using Reactant Orientation via Electric Fields

利用电场定向反应物实现化学反应过程的选择性

• 批准号: 9623810
• 负责人: Wei Kong
• 金额: $ 36.95万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-01 至 2000-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9623810&HistoricalAwards=false
• 关键词: Achieving; Selectivity; Chemical; Reaction; Process

Wei Kong of Oregon State University has been awarded a CAREER grant in the Experimental Physical Chemistry Program to investigate ways of orienting chemical reactants to achieve reaction selectivity. The goal is the ability to selectively cleave a designated chemical bond with minimum effects from competitive pathways. Using supersonic molecular beams and moderate electric fields, orientation of polar reactants has been observed. The oriented chemical bond will then be selectively dissociated by a linearly polarized laser. Depending on the direction of the transition dipole moment of the oriented molecules and the polarization direction of the laser, one reaction coordinate will be preferentially excited, resulting in selective cleavage of a chemical bond. Prof. Kong's educational plans include development of a new course on chemical reaction dynamics emphasizing a `case studies` approach, and the teaching of an existing quantum chemistry course from a historical perspective. Selectivity in a multiple-path reaction is one of the most fascinating questions in chemical kinetics and reaction dynamics, and achieving selectivity has been a major driving force in many scientific endeavors. With selectivity, different reaction pathways can be isolated and investigated in detail. This ability will not only allow a deeper understanding of each reaction path, but also enable investigations of systems that would otherwise be too complicated to tackle.

俄勒冈州立大学的魏刚获得了实验物理化学项目的职业资助金，该项目旨在研究如何定向化学反应物以实现反应选择性。我们的目标是能够选择性地切割指定的化学键，并将竞争途径的影响降至最低。利用超音速分子束和中等电场，观察到了极性反应物的取向。然后，定向的化学键将被线偏振激光选择性解离。根据取向分子的跃迁偶极矩的方向和激光的偏振方向，一个反应坐标将被优先激发，导致化学键的选择性断裂。孔教授的教育计划包括开发一门新的化学反应动力学课程，强调“案例研究”的方法，以及从历史的角度教授现有的量子化学课程。多路径反应的选择性是化学动力学和反应动力学中最引人入胜的问题之一，而实现选择性一直是许多科学努力的主要驱动力。具有选择性，可以分离和详细研究不同的反应路径。这种能力不仅可以更深入地了解每条反应路径，还可以对原本过于复杂而难以处理的系统进行研究。