Ultrafast Spectroscopy and Other Applications of Lasers in Chemistry

超快光谱学和激光在化学中的其他应用

• 批准号: 9617203
• 负责人: Robin Hochstrasser
• 金额: --
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9617203&HistoricalAwards=false
• 关键词: Ultrafast; Spectroscopy; Other; Applications; Lasers

Robin Hochstrasser of the University of Pennsylvania is supported by the Experimental Physical Chemistry Program to continue his studies on ultrafast dynamics in liquids. Femtosecond (fs) laser spectroscopic techniques will be brought to bear on two central themes: solvent control of chemical reactions and the relaxation of molecular excitations. Specific techniques to be developed include fs transient infrared spectroscopy at low frequencies; terahertz spectroscopy to probe low frequency motions in molecular pump-probe experiments; and fs time-resolved X-ray scattering on liquid samples. Focus is on solvent-assisted uni- and bimolecular reaction dynamics and electronic and vibrational relaxation. Quantum chemical calculations of the potential energy surfaces and classical molecular dynamics simulations will also be carried out. The study of the transformation of energetically excited molecules in condensed phases from one molecular isomeric configuration to another will significantly expand our knowledge of how a complex molecule undergoes internal rearrangements and how these are mediated by a surrounding solvent.

宾夕法尼亚大学的罗宾·霍克斯特拉瑟得到了 实验物理化学计划，继续他的研究 液体中的超快动力学 飞秒激光光谱 技术将带来承担两个中心主题：溶剂 化学反应的控制和分子的松弛 兴奋。 有待开发的具体技术包括fs瞬态 低频红外光谱;太赫兹光谱探测 分子泵-探测实验中的低频运动;和fs 液体样品上的时间分辨X射线散射。 重点是 溶剂辅助单分子和双分子反应动力学和电子学 和振动松弛。 量子化学计算 势能面和经典分子动力学模拟 也将进行。 研究了高能激发态分子在 从一种分子异构构型到另一种分子异构构型的凝聚相 将大大扩展我们对复杂分子 经历内部重组，以及这些是如何通过 周围溶剂。