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赠款的支持，该计划研究了在极压下出现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受到极低压力条件的影响的重要信息。 在这个项目中，Chronister将利用高压和时间分辨的相干光谱研究来研究无法通过其他方式获得的固态分子间相互作用的细节。 尽管温度为系统在势能表面上移动的能量提供了能量，但密度增加的效果却大不相同，因为它会影响势能表面的形状。 Chronister的研究将有助于开发光学脱位，振动弛豫和不均匀连贯性损失的动态理论，所有这些都由分子间势能函数的形状控制。 由于尚未完成低温分子固体弛豫动力学的高压研究，因此计时将从对纯晶体和混合晶体系统以及一些新型分子固体的详细研究开始。