Spectroscopy in Supersonic Molecular Beams

在化学系实验物理化学计划的这个项目中，芝加哥大学化学系的D.H.Levy教授将对生物化学感兴趣的分子和弱结合分子络合物的光化学进行一系列研究。研究范德华体系，包括氨基四嗪络合物，有机二聚体中的质子转移反应，以及对卟啉二聚体的研究。用光谱技术研究氨基酸和多肽在气相中的结构，双色分子中的电荷和能量转移，以及脆弱有机分子的激光脱附。这项研究计划的基本目标是更好地了解大生物分子的性质。生物分子的结构和功能之间的关系是通过对简单氨基酸、多肽和更大的生物分子复合体的其他构件的光谱研究来确定的。不仅是结构，而且质子从一个分子转移到另一个分子的速度，以及电荷和能量在络合物中移动或定位的速度也对这种理解很重要。正在开发特殊的技术来蒸发弱结合的生物分子复合体，而不同时将它们解离成其组成分子。

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.