Kinetics and Mechanisms in Gas Phase Ion Chemistry

Bierbaum博士得到了实验基金会的资助。 物理化学计划，研究反应性，机制 以及离子-分子过程的产物分布 平动能的函数。 她一直在帮助 设计和建造一个新的非常强大的 能够进行灵敏的高分辨率成像的装置 离子动能分布的测量。 这些 实验技术为更好地 在分子水平上理解化学反应。 新开发的仪器被称为串联 流动的余辉-SIFT-漂移设备提供了特别的 高灵敏度、分辨率和化学通用性， 研究气相中的离子-分子反应。 新 仪器将被用来研究各种化学物质 系统包括五个调查领域：1）研究 包括反应性、机理和产物分布 作为平移能函数的离子-分子过程; 2)卤代烷反应中的动力学同位素效应; 振动激发离子的弛豫和反应; 4） 新型负离子的产生和表征;以及5） 离子等离子体过程的研究。 这些研究将提供 动力学、机理和热化学数据， 重要的离子分子反应。

Dr. Bierbaum is supported by a grant from the Experimental Physical Chemistry Program to study the reactivity, mechanism and product distributions of ion-molecule processes as a function of translational energy. She has been instrumental in the design and construction of a new and very powerful apparatus which is capable of making sensitive high resolution measurements of ion kinetic energy distributions. These experimental techniques provide a firm foundation for a better understanding of chemical reactivity at a molecular level. The newly developed instrument which is known as a Tandem Flowing Afterglow-SIFT-Drift apparatus provides exceptionally high sensitivity, resolution and chemical versatility for the study of ion-molecule reactions in the gas phase. The new instrument will be employed to study a variety of chemical systems comprising five areas of investigation: 1) Studies involving reactivity, mechanisms and product distributions of ion-molecule processes as a function of translational energy; 2) Kinetic isotope effects in reactions of alkyl halides; 3) Relaxation and reaction of vibrationally excited ions; 4) Generation and characterization of novel negative ions; and 5) Studies of ion-plasma processes. These studies will provide kinetic, mechanistic and thermochemical data for a wide variety of important ion-molecule reactions.