Spectroscopy, Dynamics, and Reactivity of Excess Electrons in Clusters

在这个由化学学部实验物理化学项目资助的奖项中，加州大学伯克利分校的Daniel M. Neumark教授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），一种飞秒泵浦探测技术。实验将在电子掺杂的纯溶剂团簇（水、甲醇和乙腈）中进行，探测电子弛豫动力学，并在卤化物阴离子掺杂的溶剂团簇中进行，其中使用电荷转移到溶剂（CTTS）激发的动力学将电子发射到溶剂网络中，在那里将研究其后续动力学。其他研究将电子给体和电子受体结合在同一簇中，这样就可以研究CTTS之后电子向受体的转移。由于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，因此概述的研究将产生许多更广泛的科学影响。本专业培养的研究生将掌握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.