Ultrafast Nonlinear and Coherent Spectroscopic Studies of Molecular Motion in Liquids

液体中分子运动的超快非线性和相干光谱研究

• 批准号: 9423935
• 负责人: Mark Berg
• 金额: $ 37.13万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1998-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423935&HistoricalAwards=false
• 关键词: Ultrafast; Nonlinear; Coherent; Spectroscopic; Studies

In this project in the Experimental Physical Chemistry Program, Mark Berg of the University of South Carolina will study the interactions responsible for solvent induced processes observed in solution phase chemistry. The polarized transient holeburning technique will be used to study solvent interactions with electronic states, and coherent Raman spectroscopies will be used to determine solvent interactions with vibrational states. Studies will be conducted as a function of temperature to span the region from solid to liquid phase across the glass transition to distinguish between phonon-induced and structural solvation dynamics. Systems to be studied include anthracenes and tetrazines in a set of quasi-spherical solvent molecules. The theory necessary to explain and interpret the experimental results will also be developed or expanded. Much of chemistry takes place in the liquid phase. However, because of the interactions between solvent molecules, it is often difficult to determine the processes responsible for chemical reactions. Professor Berg will apply sophisticated laser techniques to differentiate various forms of these interactions and their effects on the internal states of molecules. Such studies will be of value in the design of new optical materials.

在实验物理化学项目中，南卡罗来纳大学的Mark Berg将研究在溶液相化学中观察到的溶剂诱导过程的相互作用。偏振瞬时烧孔技术将用于研究溶剂与电子态的相互作用，相干拉曼光谱将用于确定溶剂与振动态的相互作用。研究将作为温度的函数进行，以跨越玻璃化转变从固体到液体的区域，以区分声子诱导的溶剂化动力学和结构溶剂化动力学。要研究的体系包括一组准球形溶剂分子中的菲和四嗪。解释和解释实验结果所需的理论也将得到发展或扩展。许多化学作用都发生在液体中。然而，由于溶剂分子之间的相互作用，往往很难确定导致化学反应的过程。伯格教授将应用复杂的激光技术来区分这些相互作用的各种形式及其对分子内部状态的影响。这些研究将对新的光学材料的设计有价值。