Spectroscopy in Supersonic Molecular Beams

在化学学部实验物理化学项目中，芝加哥大学化学系D.H. Levy教授将对具有生物化学兴趣的分子和弱结合分子复合物的光化学进行一系列研究。范德华体系涉及氨基四氮配合物的研究，有机二聚体中的质子转移反应，以及卟啉二聚体的研究将进行。利用光谱学技术研究氨基酸和多肽的气相结构、双显色分子中的电荷和能量转移以及易碎有机分子的激光解吸。这项研究计划的潜在目标是更好地了解大型生物分子的特性。生物分子的结构和功能之间的关系是通过对简单氨基酸、多肽和其他更大的生物分子复合物的构建块的光谱研究来确定的。不仅是结构，质子从一个分子转移到另一个分子的速率，以及电荷和能量在复合物内移动或定位的速率也对这种理解很重要。目前正在开发一种特殊的技术来蒸发弱结合的生物分子复合物，而不同时将它们解离成它们的组成分子。

In this project of the Experimental Physical Chemistry Program in the Chemistry Division, Prof. D.H. Levy of the Chemistry Department of the University of Chicago will conduct a series of investigations on the photochemistry of molecules and weakly bound molecular complexes of biochemical interest. Studies of van der Waals systems involving complexes of amino tetrazine, proton transfer reactions in organic dimers, and investigations of porphyrin dimers will be undertaken. The structures of amino acids and peptides in the gaseous phase, the charge and energy transfer in bi-chromophoric molecules, and laser desorption of fragile organic molecules will be investigated by spectroscopic techniques. The underlying goal of this research program is to obtain a better understanding of the properties of large biomolcules. The relationship between the structure and function of biomolcules is to be determined through the spectroscopic investigations of simple amino acids, peptides and other building blocks of the larger biomolecular complexes. Not only the structures, but also the rate at which protons can transfer from one molecule to another, as well as the rate at which electric charge and energy move or are localized within a complex are also important for this understanding . Special techniques are being developed to vaporize weakly bound biomolecular complexes without at the same time dissociating them into their component molecules.