Mode-Selective Differential Scattering as a Probe of Polyatomic Ion Reaction Dynamics

安德森在实验物理化学计划的支持下，使用高分辨率的导离子束散射仪，通过模式选择微分散射方法，继续研究包含3到大约15个原子的小多原子离子的反应。其目的既是为了探索这些复杂体系的详细反应机理，也是为了深入了解不同类型的反应物核运动对化学反应性的影响。质量分析阈值电离(MATI)和多光子电离(MPI)将被用来开发制备振动模式选择的反应物离子的路线，然后对这些离子进行实验。从这些研究中获得的信息将促进对复杂体系中反应动力学的理解，从而有助于开发优化化学反应的方法。当离子和分子相互碰撞时，在某些情况下它们的化学键排列可能会发生变化。这些研究试图提高对内部分子运动如何影响发生成键变化的碰撞结果的详细理解。这些知识是获得关于化学变化本质的有用见解的核心。

Anderson is supported by the Experimental Physical Chemistry Program to continue his studies of reactions of small polyatomic ions containing from three to about fifteen atoms by mode-selected differential scattering methods, using a high-resolution guided-ion beam scattering instrument. The goal is both to probe detailed reaction mechanisms for these complex systems, and to provide insight into the effects of different types of reactant nuclear motion on chemical reactivity. Mass-analyzed threshold ionization (MATI) and multiphoton ionization (MPI) will be used to develop routes to prepare vibrationally mode-selected reactant ions, and then to carry out experiments with these ions. The information gained from these studies will advance the understanding of reaction dynamics in complex systems, and thus may aid in developing approaches to optimize chemical reactions. When ions and molecules collide with one another, changes in their chemical bonding arrangement can occur under certain circumstances. These studies seek to improve the detailed understanding of how internal molecular motions affect the outcomes of collisions in which bonding changes occur. Such knowledge is central to attaining useful insights about the nature of chemical change.