The Study of Molecular Relaxation in Simple Glass-Forming Polar Liquids and Mixtures

简单玻璃形成极性液体和混合物中分子弛豫的研究

• 批准号: 9614950
• 负责人: John Berberian
• 金额: $ 12.08万
• 依托单位: St Joseph's University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614950&HistoricalAwards=false
• 关键词: Study; Molecular; Relaxation; Simple; Glass

In this RUI project funded by Experimental Physical Chemistry in the Chemistry Division, Prof. Berberian (St. Joseph's College) will study molecular relaxation in simple glass-forming polar liquids and mixtures using both dielectric and heat capacity measurements. The two techniques complement each other and will help understand the interactions involved between components of mixtures of organic liquids, particularly the relaxation processes. Results of these data will contribute to explaining the behavior of more complex systems. The work is to be carried out with the aid of undergraduate assistants, who will benefit by exposure to modern research equipment and methodology. %%% Some molecules possess tiny electric dipole moments. By dissolving such molecules in mixtures of electrically inert species of similar size and shape, and making the solution part of an electric circuit, it is possible to use variations in current to study how the surroundings of a molecule influence its rotational motion. This is important because at low temperatures where the motion becomes extremely sluggish, detailed understanding of the intermolecular forces is absent. Prof. Beberian's project in this area will lead to an improved undertanding of this `glassy` state of matter.

在这项由化学系实验物理化学资助的RUI项目中，伯伯利亚教授(圣约瑟夫学院)将使用介电和热容测量来研究简单玻璃形成的极性液体和混合物中的分子弛豫。这两种技术相辅相成，将有助于理解有机液体混合物中各组分之间的相互作用，特别是松弛过程。这些数据的结果将有助于解释更复杂的系统的行为。这项工作将在本科生助理的帮助下进行，他们将受益于接触到现代研究设备和方法。有些分子具有微小的电偶极矩。通过将这种分子溶解在大小和形状相似的电惰性物质的混合物中，并使溶液成为电路的一部分，就有可能利用电流的变化来研究分子周围环境如何影响其旋转运动。这一点很重要，因为在运动变得极其缓慢的低温下，缺乏对分子间力的详细了解。Beberian教授在这一领域的研究将使人们更好地理解这种“不透明”的状态。