Multidimensional Femtosecond Studies of Chemical Reaction Dynamics in Condensed Phases

凝聚相化学反应动力学的多维飞秒研究

• 批准号: 0317110
• 负责人: David Jonas
• 金额: $ 45.2万
• 依托单位: University of Colorado at Boulder
• 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 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0317110&HistoricalAwards=false
• 关键词: Multidimensional; Femtosecond; Studies; Chemical; Reaction

The Experimental Physical Chemistry Program of the Chemistry Division funds this project. Experimental and theoretical studies will be undertaken to develop techniques for two-dimensional (2D) Fourier transform optical and infrared spectroscopies in analogy to the well-established 2D Fourier transform nuclear magnetic resonance (NMR) methods. To this end work will focus on four broad areas: 1) theoretical studies will be undertaken of pulse propagation and signal generation in a sample to enable quantitative experiments on optically dense samples; 2) experiments will be done to attempt a demonstration of optical analogs of the "intramolecular" and "intermolecular" double quantum coherence found in magnetic resonance; 3) 2D vibrational correlation spectra will be measured for a series of molecules with identical oscillators in various geometries; and 4) the electronic dynamics in the degenerate states of a few molecules will be probed by 2D spectroscopy and polarization dependent pump-probe experiments using femtosecond pulses from a high stability visible optical amplifier.2D Fourier transform infrared and optical spectroscopy is a relatively new t that has the potential of becoming an important analytical tool. Just as in 2D-NMR, analogous 2D-optical and infrared Fourier transform spectra may show characteristic vibrational frequencies in two-dimensional patterns that reveal adjacent bonds and their relative geometry. A long-term goal of this work is to develop of new 2D optical spectrometers for the measurement of new molecular properties. Graduate and undergraduate students as well as postdoctoral research associates will participate in this research. They will acquire new knowledge and skills in preparation for advance studies or entrance into the scientific/technological job market.

化学系的实验物理化学计划资助了这个项目。 将进行实验和理论研究，以开发二维傅里叶变换光学和红外光谱技术，类似于成熟的二维傅里叶变换核磁共振（NMR）方法。 为此，将集中在四个主要方面：1）将对样品中脉冲传播和信号产生进行理论研究，以便能够对光学致密样品进行定量实验; 2）将进行实验，试图演示磁共振中发现的“分子内”和“分子间”双量子相干的光学模拟; 3）测量了一系列具有相同振子的不同几何构型分子的二维振动相关谱; 4）少数分子简并态的电子动力学将通过二维光谱和偏振相关泵浦探测。探测实验使用飞秒脉冲从一个高稳定性的可见光放大器。二维傅里叶变换红外和光学光谱是一个相对较新的测试，有可能成为一个重要的分析工具。 就像在2D-NMR中一样，类似的2D光学和红外傅里叶变换光谱可以显示二维模式中的特征振动频率，从而揭示相邻键及其相对几何形状。 这项工作的长期目标是开发新的二维光谱仪，用于测量新的分子特性。 研究生和本科生以及博士后研究助理将参与这项研究。他们将获得新的知识和技能，为进一步学习或进入科学/技术就业市场做准备。