Femtosecond Spectroscopy of Reaction Coordinate Motion in Solution

芭芭拉教授是由实验物理支持 “真实的”化学实验研究方案 沿着反应坐标的运动动力学的“时间” 在溶液中进行化学反应。 选择的系统 特别适合理论解释， 使人们对液相反应有了基本的了解。 的 研究直接影响对金属-金属的理解 电荷转移反应和低温电子转移 与光合作用有关的机制。 芭芭拉教授正在开发各种新颖的泵浦探测器 超快光谱技术，并将其应用于 基态和激发态的电子转移反应。 超短激光脉冲的共振电子激发， 用于制备反应体系， 过渡态附近的几何形状。 后续演化 然后监测系统沿着反应坐标的 通过飞秒光谱学。 各种理论模型和 模拟是用来帮助解释实验 结果

Professor Barbara is supported by the Experimental Physical Chemistry Program in an experimental investigation in "real time" of the dynamics of motion along the reaction coordinate for chemical reactions in solution. Systems are chosen that are especially amenable to theoretical interpretation and that allow fundamental insight into liquid phase reactions. The research directly impacts on the understanding of metal-metal charge transfer reactions and low temperature electron transfer mechanisms relevant to photosynthesis. Professor Barbara is developing various novel pump-probe techniques for ultrafast spectroscopy and applying them to electron transfer reactions in both ground and excited states. Resonant electronic excitation by an ultrashort laser pulse is used to prepare a reaction system in a distribution of geometries near the transition state. The subsequent evolution of the system along the reaction coordinate is then monitored by femtosecond spectroscopy. Various theoretical models and simulations are used to aid in interpreting the experimental results.