Femtosecond Dynamics of IVR and Reactivity in Complex Systems

加州理工学院的Ahmed H.Zewail在实验物理化学计划的支持下，继续他在分子内振动弛豫(IVR)和复杂系统中的反应性的飞秒动力学研究。在此期间，他将专注于以下领域：a)复杂体系的实验和理论研究；b)复杂溶剂化作用下的研究：气体与液体；以及c)过渡态和IVR：反应性的控制。将使用的技术包括皮秒和飞秒激光与配备飞行时间质谱仪的分子束机器相结合；光电子和激光诱导的荧光室。此外，凝聚相研究将利用瞬时吸收和荧光上转换技术。除了对研究生和博士后同事的教育外，这项工作还具有基本意义，很可能转化为应用。了解复杂系统的化学为尝试制造更好的材料和改变复杂的生物化学奠定了基础。

Ahmed H. Zewail of the California Institute of Technology is supported by the Experimental Physical Chemistry Program to continue his studies on femtosecond dynamics of intramolecular vibrational relaxation (IVR) and reactivity in complex systems. During this period he will focus on the following areas: a) experimental and theoretical studies of complex systems; b) studies under complex solvation: gas vs. liquid; and c) transition states and IVR: control of reactivity. Techniques to be used include picosecond and femtosecond lasers in conjunction with molecular beam machines equipped with time-of-flight mass spectrometry; photoelectron and laser-induced fluorescence chambers. In addition, the condensed phase studies will exploit transient absorption and fluorescence up-conversion techniques. In addition to the education of graduate students and post-doctoral coworkers, this work has fundamental significance that is likely to translate into applications. Understanding the chemistry of complex systems lays the ground-work for attempts to make better materials and alter complex biological chemistry.