Direct IR Laser and Double Resonance Absorption Spectroscopy in Split Supersonic Jets: Vibrational Dynamics of Novel Molecular Clusters

在实验物理化学计划的这个项目中，科罗拉多大学的大卫·内斯比特将使用基于激光的光谱方法研究范德华分子的势能面。这些研究将集中在氢键物种和包括HF、HCl和水在内的多个稀有气体簇系统上。其他工作将侧重于自由基的产生和红外表征，以及典型的重-轻-重反应体系的光谱和动力学，如氯-HCl和F-HF。高分辨率的近红外光将被用来选择一个星团，随后将在涉及反应和非弹性散射的研究中进行光解。这些体系包括DCL-HCl和XH-NNO(ONN)，并提供对团簇大小、量子态和反应物接近几何的控制。势能面的确定提供了理解和控制化学反应过程所需的信息。奈斯比特教授的研究将为一类被称为重-轻-重反应的重要化学反应提供量子态特性和特定的反应物方法几何。从这项工作中获得的信息将是使用激光控制化学反应结果的重要一步。

In this project in the Experimental Physical Chemistry Program, David Nesbitt of the University of Colorado will investigate the potential energy surfaces of van der Waals molecules using laser based spectroscopic methods. These studies will concentrate on hydrogen bonded species and multiple rare-gas cluster systems including HF, HCL, and water. Additional work will focus on the production and infrared characterization of radical and radical complexes of important atmospheric components such as the peroxyl radical, and the spectroscopy and dynamics of prototypical heavy-light-heavy reactive systems such as Cl-HCl and F-HF. High resolution near infrared light will be used to state-select a cluster which will be subsequently photolyzed in studies involving reactive and inelastic scattering. These systems include DCl-HCl and XH-NNO (ONN), and provide control over cluster size, quantum state, and reactant approach geometry. The determination of potential energy surfaces provides the information needed to understand and control the course of a chemical reaction. Professor Nesbitt's studies will provide quantum state specificity and a specific reactant approach geometry for an important class of chemical reactions known as heavy-light-heavy reactions. The information obtained from this work will be an important step towards using lasers to control of the outcome of chemical reactions.