Ultrafast Dynamics of Molecular Solids Under Extreme Pressure

极压下分子固体的超快动力学

• 批准号: 9008551
• 负责人: Eric Chronister
• 金额: $ 18.2万
• 依托单位: University of California-Riverside
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9008551&HistoricalAwards=false
• 关键词: Ultrafast; Dynamics; Molecular; Solids; Under

Dr. Eric Chronister is supported by a grant from the Experimental Physical Chemistry Program to study fast dynamical processes which occur in molecular solids at extreme pressures. These experiments will provide important information on how chemical reactions are influenced by conditions of extreme pressure at very low temperatures. In this project Chronister will utilize high pressure and time-resolved coherent spectroscopies to study details of solid state intermolecular interactions which cannot be obtained by other means. Although temperature provides the energy for a system to move on a potential energy surface, the effect of increased density is very different since it influences the shape of the potential energy surface. Chronister's research will be useful in developing dynamic theories of optical dephasing, vibronic relaxation and inhomogeneous coherence loss, all of which are controlled by the shape of the intermolecular potential energy function. Since no high pressure studies of relaxation dynamics of molecular solids at low temperature have yet been done, Chronister will begin with detailed studies of pure and mixed crystal systems as well as some novel molecular solids.

Eric Chronister博士得到了实验物理化学计划的资助，用于研究在极端压力下发生在分子固体中的快速动力学过程。这些实验将提供有关化学反应如何在极低温度下受到极端压力条件影响的重要信息。在这个项目中，Chronister将利用高压和时间分辨的相干光谱仪来研究固态分子间相互作用的细节，这是其他方法无法获得的。虽然温度为系统在势能面上运动提供了能量，但密度增加的效果是非常不同的，因为它影响势能面的形状。Chronister的研究将有助于发展光学消相、振动弛豫和非均匀相干损耗的动力学理论，所有这些都由分子间势能函数的形状控制。由于还没有对分子固体在低温下的弛豫动力学进行高压研究，Chronister将首先对纯晶和混合晶系以及一些新的分子固体进行详细研究。