Dynamics of Electronically Excited States. Models for Chemical Reactivity

实验物理化学项目支持普拉特教授的研究小组继续研究大有机分子的高分辨率电子光谱。 从这些研究中获得的信息正在导致我们对大分子中分子间能量流的理解进行显着的定量测试和显着的定性改进。 在所研究的 3-4 eV 激发能和几 MHz 光谱分辨率下，激发电子态的离散自旋-旋转-振动能级嵌入属于一个或多个较低电子态的更高密度流形（甚至准连续体）能级中。 这些流形之间的耦合允许快速发生化学上有趣的过程；该研究试图从本征态分辨光谱中提取有关这些耦合的信息。

The Experimental Physical Chemistry Program supports the research group of Professor Pratt in a continued investigation of high-resolution electronic spectroscopy of large organic molecules. The information gained from these investigations is leading to significant quantitative tests and dramatic qualitative improvements in our understanding of intermolecular energy flow in large molecules. At the studied excitation energies of 3-4 eV and the spectroscopic resolution of a few MHz, the discrete spin-rotation-vibration energy levels of excited electronic states are imbedded in a higher density manifold (or even a quasi-continuum) of levels belonging to one or more lower electronic states. Couplings between these manifolds permit rapid occurrence of chemically interesting processes; the research attempts to extract information about these couplings from eigenstate-resolved spectra.