Ultrafast Dynamics of Molecular Solids Under High Pressure

高压下分子固体的超快动力学

• 批准号: 9714886
• 负责人: Eric Chronister
• 金额: $ 37.82万
• 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: 1998
• 资助国家: 美国
• 起止时间: 1998-01-01 至 2001-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9714886&HistoricalAwards=false
• 关键词: Ultrafast; Dynamics; Molecular; Solids; Under

In this project supported by the Experimental Physical Chemistry Program of the Chemistry Division, Chronister will combine high-pressure diamond anvil techniques and ultrafast nonlinear coherent spectroscopic methods as a high-resolution probe of molecular solids. Infrared and visible photon echo experiments will be conducted on mixed molecular solids and amorphous glasses in order to elucidate the dynamical processes taking place in condensed phases. The proposed experiments will examine electronic and vibronic dynamics in inhomogeneously broadened solids as a function of temperature and density and will be used to refine theories of optical and vibrational dephasing in amorphous and mixed crystalline solids. High pressure applied to materials provides a way of altering the interactions between molecules in a solid in a continuously controlled manner. This allows for the systematic study of the attractive and repulsive forces that exist on an atomic level. Chronister will measure the behavior of solids under high pressure and low temperature conditions. The information gathered is difficult to obtain because the pressures involved are extremely high and temperatures are very low. However, these data will ultimately aid our understanding of the dynamic interactions between species in solid solution and their host materials. The sorts of studies undertaken here also reveal much about the behavior of materials under extreme conditions.

在这个由实验物理化学计划支持的项目中， Chronister将联合收割机高压金刚石 砧技术和超快非线性相干光谱方法 作为分子固体的高分辨率探针。 红外和可见 光子回波实验将在混合分子固体上进行， 非晶玻璃，以阐明动力学过程， 放置在凝聚相中。 拟议的实验将检查 非均匀加宽固体中的电子和振动动力学 温度和密度的函数，并将用于完善理论 非晶和混合晶体中的光学和振动退相 固体 施加到材料上的高压提供了一种改变 固体中分子之间的相互作用， 方式 这使得系统的研究有吸引力的， 存在于原子水平上的排斥力。 Chronister将测量 固体在高压和低温下的行为 条件 收集的信息很难获得，因为 所涉及的压力非常高，温度非常低。 然而，这些数据最终将有助于我们了解动态 固溶体中的物质与其主体材料之间的相互作用。 这里进行的各种研究也揭示了很多关于行为的信息 材料在极端条件下。