Spectroscopy, Dynamics, and Reactivity of Excess Electrons in Clusters

在这个由化学系实验物理化学计划资助的奖项中，丹尼尔M。加州-伯克利大学的Neumark和他的研究生同事将对带负电荷的团簇中的多余电子进行光谱和动力学研究。 这些研究将使用时间分辨光电子成像（TRPEI），飞秒泵浦探测技术。 实验将进行电子掺杂，纯溶剂簇（水，甲醇和乙腈），探测电子弛豫动力学，并在卤化物阴离子掺杂的溶剂簇，其中的电荷转移到溶剂（CTTS）激发的动力学是用来发射电子到溶剂网络，在那里其随后的动态将进行研究。 其他研究将联合收割机电子供体和电子受体结合在同一个集群中，在那里可以研究CTTS，然后电子转移到受体。概述的研究将有一些更广泛的科学影响，因为溶剂化电子在从大气化学到生物学和医学的许多科学领域中无处不在。 在该计划中培养的研究生将获得实验和理论化学物理研究的重要技能。

In this award, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Prof. Daniel M. Neumark of the University of California - Berkeley and his graduate student colleagues will carry out spectroscopic and dynamical studies of excess electrons in negatively charged clusters. These studies will be done using time-resolved photoelectron imaging (TRPEI), a femtosecond pump-probe technique. Experiments will be conducted with electron-doped, pure solvent clusters (water, methanol and acetonitrile), probing the electron relaxation dynamics, and in halide anion-doped solvent clusters, in which the dynamics of charge-transfer-to-solvent (CTTS) excitation is used to launch an electron into the solvent network, where its subsequent dynamics will be studied. Other studies will combine electron donor and electron acceptor in the same cluster, where CTTS followed by electron transfer to acceptor can be studied.The studies outlined will have a number of broader scientific impacts, since solvated electrons are ubiquitous in a number of scientific areas from atmospheric chemistry to biology and medicine. The graduate students trained in this program will acquire significant skills in experimental and theoretical chemical physics research.