Laser Pump-probe Studies of Reaction Dynamics from One Picosecond to Nanoseconds

实验物理化学计划支持教授J.D.麦当劳 伊利诺伊大学香槟分校的研究人员 关于反应动力学。 具体地说，麦克唐纳教授将使用一个泵探测器， 一种研究双分子化学反应动力学的技术， 皮秒时间尺度。 反应物是在一个反应器中形成的货车范德华加合物。 冷却的分子束，以及中间体和/或产物将被检测 使用飞行时间质谱法或激光诱导 荧光。 此外，反应过程将通过以下方式建模： 经典轨迹计算或统计理论。 典型 研究的反应包括重排或分解， 氯或氧原子与不饱和脂肪酸加成形成的加合物 碳氢化合物分子 这项工作的结果对理解和 模拟反应，这是重要的燃烧过程中， 大气的化学成分。 氧原子反应非常 在这两个复杂系统中都很重要，氯原子也很重要， 在高层大气中。

The Experimental Physical Chemistry Program supports Prof. J. D. McDonald of the University of Illinois in Champaign-Urbana in his investigations on reaction dynamics. Specifically, Prof. McDonald will use a pump-probe technique to study the dynamics of bimolecular chemical reactions on a picosecond timescale. Reactants are van der Waals adducts formed in a cooled molecular beam, and intermediates and/or products will be detected using either time-of-flight mass spectrometry or laser-induced fluorescence. In addition, reaction processes will be modeled by classical trajectory calculations or statistical theories. Typical reactions to be investigated include rearrangements or decomposition of adducts formed by addition of chlorine or oxygen atoms to unsaturated hydrocarbon molecules. The results of this work are of great value to the understanding and modeling of reactions which are important in combustion processes and in the chemistry of the atmosphere. Oxygen atom reactions are very important in both these complex systems, and chlorine atoms are important in the upper atmosphere.