Molecular Spectroscopy

在这个由化学部实验物理化学计划支持的项目中，Klemperer将研究小货车德瓦尔斯络合物的动力学和结构。 他将使用种子射流的腔内激光诱导荧光（LIF）来获得非常高的内部激发能量，随后获得产物光碎片的旋转振动分布。 Klemperer还将利用微波光学双共振技术（MODR）进行非常高分辨率的研究，这将允许测量超精细结构和精确的电偶极矩。 他将专注于在价键拉伸的高激发水平下涉及HF（HF，H2O，HCl）的络合物，例如，v=4级HF拉伸。 最终目标是获得分子间势能面的信息，并为振动预解离动力学模型提供严格的检验，分子的结构和它们之间的吸引力是决定它们反应性的部分原因。 这项研究将提供这些相互作用的性质和分子结构对化学键合的影响的详细信息。 这些信息对于理解溶剂对化学反应的影响或蛋白质和核酸的折叠模式非常重要。

In this project supported by the Experimental Physical Chemistry Program of the Chemistry Division, Klemperer will study the dynamics and structure of small van der Waals complexes. He will use intracavity laser induced fluorescence (LIF) of seeded jets to achieve very high internal excitation energies and subsequently obtain the rotation-vibration distribution of the product photofragments. Klemperer will also exploit microwave-optical double resonance techniques (MODR) for very high-resolution studies, which will allow measurement of hyperfine structure and precise electric dipole moments. He will focus on complexes involving hydrides (HF, H2O, HCl) at high excitation levels of valence bond stretching, e.g., v=4 levels of HF stretch. The ultimate goal is to obtain information on the intermolecular potential surfaces and to provide stringent tests for models for vibrational predissociation dynamics.The structures of molecules and the attractive forces between them are, in part, responsible for their reactivity. This research will provide detailed information on the nature of these interactions and the effect of molecular structure on chemical bonding. Such information is important for understanding the effects of solvents on chemical reactions or the folding patterns of proteins and nucleic acids.