Vibrational Dynamics & Spectroscopy in the Gas Phase and in Superfluid Helium Droplets: Molecules, Radicals, Clusters and Metal Complexes

北卡罗来纳大学教堂山分校的罗杰·米勒教授由实验物理化学项目资助，对超流氦液滴中的团簇进行实验研究。最近发现，超流氦是最均匀的凝聚相介质。米勒是第一个利用这一知识对这种介质中的分子进行非常高分辨率的光谱测量的人之一。米勒发现了新的团簇结构，这种结构是由氰基乙炔和这些液滴中的水等小分子形成的。本工作将氦液滴光谱扩展到新的合成用途，用于研究O，H，OH和CN等反应前自由基，研究金属团簇上的分子，以及研究小分子的溶剂化作用。继续探索液氦液滴中的分子聚集将对评估将这种新的自组装方法扩展到大块液氦中更大规模的生长过程的机会起到重要作用。新颖的团簇合成为试图模拟聚集形式的水等分子的行为的理论家提供了有价值的数据。模拟水和溶剂化是更准确地计算生物系统和药物设计的一个重要目标。

Professor Roger Miller of the University of North Carolina at Chapel Hill is funded by the Experimental Physical Chemistry program to perform experimental studies on clusters in superfluid helium droplets. It was recently discovered that superfluid helium is the most homogeneous condensed phase medium. Miller is among the first to utilize this knowledge to conduct spectroscopic measurements at very high resolution on molecules within this medium. Miller has discovered novel cluster structures that form from small molecules such as cyanoacetylene and water in these droplets. The present work extends the helium droplet spectroscopy for novel synthetic uses, for the study of pre-reactive free radicals such as O, H, OH, and CN, for the study of molecules bound to metal clusters, and for the study of solvation of small molecules.Continued exploration of molecular aggregation in liquid helium droplets will play an important role for assessing the opportunities to extend this new self assembly method to larger scale growth processes in bulk liquid helium. Novel cluster synthesis provides valuable data for theorists who attempt to model behavior of molecules such as water in aggregate form. Modeling water and solvation is an important goal for more accurate calculations of biological systems and drug design.