Spectroscopy, Dynamics, and Reactivity of Excess Electrons in Clusters

团簇中多余电子的光谱学、动力学和反应性

• 批准号: 0649647
• 负责人: Daniel Neumark
• 金额: $ 72.5万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0649647&HistoricalAwards=false
• 关键词: Spectroscopy; Dynamics; Reactivity; Excess; Electrons

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.

在这个由化学系实验物理化学计划资助的奖项中，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负电团簇中的过剩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)进行，这是一种飞秒泵浦-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，探索电子弛豫动力学，并在卤化物阴离子掺杂的溶剂团簇中进行实验，其中电荷转移到溶剂(CTTS)的激发动力学用于将电子发射到溶剂网络中，在那里将研究其后续的动力学。其他研究将在同一簇中结合电子供体和电子受体，在那里可以研究CTTS，然后电子转移到受体。概述的研究将产生一些更广泛的科学影响，因为溶解的电子在从大气化学到生物和医学的许多科学领域中无处不在。在这个项目中培训的研究生将在实验和理论化学物理研究方面获得重要的技能。