Experimental Studies of the Excess Electron in Molecular Clusters

物理化学实验与化学实验 仪器计划支持约翰逊教授在 尺寸选择簇阴离子的实验研究。 工作 将着重研究负电荷水 团簇，水合电子的团簇类似物。 正在调查的具体问题包括 可见吸收光谱与团簇尺寸和 将电子捕获在团簇中的弛豫过程。 过量电子的反应正在研究中， 碰撞涉及大小选择簇阴离子。 信息 也得到了对团簇大小的依赖性 形态和各种吸附物分子的扩散 从星团表面进入星团内部。 高 分辨率光谱学也被用来表征 更小的二进制集群的结构。

The Experimental Physical Chemistry Program and the Chemical Instrumentation Program support Professor Johnson in experimental studies of size-selected cluster anions. The work will emphasize the investigation of negatively charged water clusters, the cluster analogue of the hydrated electron. Specific issues being investigated include the evolution of the visible absorption spectrum with cluster size and the relaxation processes that trap the electron in the cluster. Reactions of the excess electron are being studied in collisions involving size-selected cluster anions. Information is also being obtained on the size dependence of cluster morphology and on the diffusion of various adsorbate molecules from the cluster surface into the cluster interior. High resolution spectroscopy is also being used to characterize the structure of smaller binary clusters.