Dynamics of Electronically Excited States: Models for Chemical Reactivity

电子激发态动力学：化学反应模型

• 批准号: 0315584
• 负责人: David Pratt
• 金额: $ 41.5万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0315584&HistoricalAwards=false
• 关键词: Dynamics; Electronically; Excited; States; Models

In this project, funded by the Experimental Physical Chemistry Program of the Chemistry Division, Prof. David Pratt of the Department of Chemistry of the University of Pittsburgh will conduct a series of experiments designed to determine the three-dimensional structures and dynamical properties of several large molecules and their weakly bound solute-solvent complexes in the gas phase. To this end, high-resolution electronic spectra of several systems relevant to the physical chemistry of life processes will be obtained by combining the techniques of supersonic expansions, cw molecular beams, single frequency UV lasers, spatially selective fluorescence detection, and high-speed data acquisition. The application of electric fields to the sample will make possible the measurement of the permanent electric dipole moments in the combining electronic states. Specific problems to be addressed are the torsional modes in intersystem crossing dynamics, the motion of helium atoms in van der Waals complexes of tetracene, the geometries of exiplexes formed in the gas phase between substituted naphthalenes, as well as other topics.Graduate and undergraduate students, as well as postdoctoral research associates will participate in this research. Close attention will be paid to the training of future teachers of K-12 science courses. The participants in this research project will gain valuable skills and knowledge in contemporary physical chemistry, as well as training in the planning and execution of research programs.

在这个由化学系实验物理化学计划资助的项目中，匹兹堡大学化学系的大卫普拉特教授将进行一系列实验，旨在确定几种大分子及其弱结合溶质-溶剂复合物在气相中的三维结构和动力学性质。 为此，高分辨率的电子光谱的几个系统相关的物理化学的生命过程将通过结合超声膨胀，连续波分子束，单频紫外激光，空间选择性荧光检测技术，和高速数据采集。 在样品上施加电场将使测量结合电子态中的永久电偶极矩成为可能。 具体研究课题包括：系间交叉动力学中的扭转模、并四苯的货车德瓦耳斯络合物中氦原子的运动、取代萘气相中形成的exixes的几何结构等，研究生、本科生和博士后研究人员将参加本研究。将密切关注K-12科学课程未来教师的培训。 该研究项目的参与者将获得当代物理化学的宝贵技能和知识，以及研究计划的规划和执行方面的培训。