Molecular and Magnetooptical Spectroscopy

在化学系物理化学计划的这个项目中，Paul N.Schatz教授将研究低温稀有气体基质中富勒烯和卟啉等大型多原子系统的磁光光谱。Schatz教授希望使用磁圆二色谱和磁圆偏振发光光谱及其零场对应物获得有关分子、离子、混合价和自由基物种的基态和激发态的基本电子结构信息。他还将进行理论分析以拟合光谱，以获得这些系统的光谱参数。通过研究原子、分子、自由基和它们各自的离子在由稀有气体原子制成的固体组成的非常冷的基质中捕获的光谱，科学家可以了解它们的分子结构和其他重要性质。沙茨教授将使用磁场和偏振光来帮助他了解几个化学上有趣的物种的电子光谱，并获得其他方式无法获得的信息。其中最有趣的是富勒烯化合物(完全由排列在封闭几何固体中的碳原子组成的分子)及其正离子和负离子以及卟啉体系。前一类化合物与材料科学有关，因为它们最近在高温超导等领域得到了应用。后者对生物无机化学很重要，并与许多生物系统有关。

In this project in the Physical Chemistry Program of the Chemistry Division, Prof. Paul N. Schatz will study the magnetooptical spectroscopy of large polyatomic systems, such as fullerenes and porphyrins, in low-temperature noble gas matrices. Prof. Schatz expects to obtain basic electronic structural information about the ground and excited states of molecular, ionic, mixed-valent, and radical species using magnetic circular dichroism and magnetic circularly polarized luminescence spectroscopies and their zero-field counterparts. He will also perform theoretical analyses to fit the spectra in order to obtain spectroscopic parameters for these systems. %%% By studying the spectroscopy of atoms, molecules, radicals, and their respective ions captured in very cold matrices consisting of solids made from noble-gas atoms, scientists can learn much about their molecular structure and other important properties. Prof. Schatz will use magnetic fields and polarized light to aid him in understanding the electronic spectra of several chemically interesting species and to acquire information which can not be obtained any other way. Among the most interesting are fullerene compounds (molecules made exclusively from carbon atoms arranged in closed geometric solids) and their positive and negative ions as well as porphyrin systems. The former compounds are relevant to materials science because of recent applications to areas such as high-temperature superconductivity. The latter are important to bioinorganic chemistry and have relevance to a number of biological sytems.