Fast Beam Photodissociation of Radicals and Clusters

在化学学部实验物理化学项目中，Neumark将研究自由基、配位不饱和有机金属自由基和中性团簇的光解光谱，以获得键能和光解动力学的信息。对于每个系统，解离电子状态将通过测量作为频率函数的光解离截面来绘制。随后将进行光解动力学实验，测量光碎片能量和角分布，并确定键解能。自由基作为初级反应物和反应中间体在化学中起着至关重要的作用。这些实验将着眼于具有开壳层电子结构的分子和具有闭壳层电子结构的分子之间不同的光谱和动力学。这些信息直接关系到自由基的化学反应性。

In this project in the Experimental Physical Chemistry Program of the Chemistry Division, Neumark will study the photodissociation spectroscopy of free radicals, coordinatively unsaturated organometallic radicals, and neutral cluster species in order to obtain information on bond energies and on the photodissociation dynamics. For each system the dissociative electronic states will be mapped out by measuring the photodissociation cross section as a function of frequency. This will be followed by photodissociation dynamics experiments in which the photofragment energy and angular distributions are measured and the bond dissociation energies are determined. %%% Free radicals play a vital role in chemistry as primary reactants and reactive intermediates. These experiments will look at the different spectroscopy and dynamics between molecules with open shell electronic structures and those with closed shells. Such information bears directly on the chemical reactivity of free radicals.