A Novel Method for the Study of Photochemical Reactions using a Combination of Stark and Raman Spectroscopies

在化学系物理化学项目中，卡内基梅隆大学的L. Peteanu教授将探索联合斯塔克-拉曼效应的可能性，以研究激发态曲线交叉点附近的振动模式耦合。Stark-Raman技术将提供一种确定（外部）电扰动场对光化学活性分子激发态振动位移的影响的能力。以前试图观察外部外加场对分子拉曼光谱的影响是不成功的，这个领域已经沉寂了40多年。目前的研究就是要探索这个本质上未知的领域。随着理论和实验技术的进步，人们期待分子光谱学的新领域将得到发展。如果成功，Stark-Raman技术将在通常的红外吸收和共振拉曼光谱技术不足的情况下有用。

In this project in the Physical Chemistry program of the Chemistry Division, Prof. L. Peteanu of the Carnegie-Mellon University will explore the possibilities of a combined Stark-Raman effect to investigate vibrational mode couplings in the neighborhood of the curve crossings of excited electronic states. The Stark-Raman technique would provide an ability to determine the effect of an (external) electric perturbing field on the vibrational displacements in the excited states of photochemically active molecules. Previous attempts to observe the influence of an externally impressed field on the Raman spectrum of a molecule were unsuccessful and this field has lain dormant for more than 40 years. The present research is to explore this essentially unknown field. With the superior theoretical and experimental techniques that are now available, there are valid expectations that a new area of molecular spectroscopy will be developed. If sucessful, the Stark-Raman technique will be useful in situations where the usual techniques of infrared absorption and resonance Raman spectroscopy are inadequate.