US-Netherlands Cooperative Research On Ultra High-ResolutionLaser Spectroscopy in Molecular Beams: The Transition from Order to Chaos.

这个奖项支持教授大卫W。普拉特大学 匹兹堡继续与W博士合作研究。L.梅什托 他是奈梅亨天主教大学物理系的教授。 他们正在进行超高分辨率激光实验， 研究发生在地球上的各种动力学现象。 大分子的电子激发态，包括 二苯甲酮，萘，喹啉，嘧啶，吡嗪，甲基 水杨酸盐和几种有机分子/稀有气体溶剂簇。 正在研究的现象包括分子内振动 弛豫，内转换，系间交叉，簇 形成和化学反应。 他们的实验将利用 最先进的连续波染料激光器工作在 紫外线、分子束和在线数据采集系统。 美国和荷兰集团带来了互补的专业知识， 高分辨率光谱学和化学动力学方法， 这项联合研究。 虽然他们现在有类似的设备， 荷兰小组是这一分子生物学领域公认的领导者。 谱 他们之前的合作使设计和 新一代“激光摄谱仪”的制造 匹兹堡大学。 分子对光的吸收产生了电子 激发态 它是这个状态的属性，而不是 基态，决定了化学和物理行为的 系统 在这件事中使用的复杂技术 合作研究将揭示分子的本征态结构， 几种生物和化学感兴趣的化合物， 时间 这些知识将使控制化学键成为可能 断裂和成型机制，从而允许控制 光的化学反应。

This award supports Professor David W. Pratt of the University of Pittsburgh to pursue research collaboratively with Dr. W. L. Meerts of the Physics Department of the Catholic University of Nijmegen. They are carrying out ultra high-resolution laser experiments to examine a variety of dynamical phenomena occurring in the electronically excited states of large molecules, including benzophenone, napthalene, quinoline, pyrimidine, pyrazine, methyl salicylate and several organic molecule/rare gas solvent clusters. The phenomena under study include intramolecular vibrational relaxation, internal conversion, intersystem crossing, cluster formation, and chemical reactions. Their experiments will utilize state-of-the-art continuous wave dye lasers operating in the ultraviolet, molecular beams, and on-line data acquisition systems. The U.S. and Dutch groups bring complementary expertise and approaches in high resolution spectroscopy and chemical dynamics to this joint research. Although they now have similar equipment, the Dutch group is the acknowledged leader in this area of molecular spectroscopy. Their prior collaboration made possible the design and fabrication of a new generation of "laser spectrograph" at the University of Pittsburgh. The absorption of light by a molecule creates an electronically excited state. It is the properties of this state, rather than the ground state, that dictate the chemical and physical behavior of the system. The sophisticated techniques being used in this collaborative research will reveal molecular eigenstate structures of several compounds of biological and chemical interest for the first time. This knowledge will make it possible to control chemical bond breaking and forming mechanisms, and thus permit the control of chemical reactions with light.