RUI: Optical Activity and Light Scattering in Highly Chiral Liquid Crystals

RUI：高手性液晶中的光学活性和光散射

• 批准号: 9224617
• 负责人: Peter Collings
• 金额: $ 9.4万
• 依托单位: Swarthmore College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9224617&HistoricalAwards=false
• 关键词: RUI; Optical; Activity; Light; Scattering

The objective of this project is to investigate the influence of chirality on phases and phase transitions in liquid crystals through the use of optical activity and light scattering measurements. Previous work has demonstrated that high chirality has a significant effect on both the phases which form in liquid crystals and the transition between phases. This project seeks to extend this work by: (1) performing similar optical activity and light scattering measurements in a new liquid crystal system to see if the previously observed effects of chirality are universal or compound specific: (2) employing dynamic light scattering to probe the time evolution of the complex fluctuations which occur in some phases and near phase transitions in highly chiral liquid crystals; and (3) investigating the fluctuations which take place in highly chiral liquid crystals at phase transitions induced by electric field. The goal in all these studies is to determine the limits of the present theoretical ideas concerning chiral liquid crystals and to suggest ways they may be extended to properly describe highly chiral systems.

本项目的目的是调查 手性对液晶相和相变的影响 通过使用旋光性和光散射 测量. 以前的工作表明，高手性 对在液体中形成的两相都有显著的影响 晶体和相之间的过渡。 本项目谋求 扩展这项工作：（1）进行类似的光学活动， 光散射测量在一个新的液晶系统，看到 如果先前观察到的手性效应是普遍的，或者 化合物特异性：（2）采用动态光散射检测 在某些情况下发生的复杂波动的时间演变 高手性液晶中的相变和近相变; （3）研究了高强度下发生的波动 手性液晶的电诱导相变 领域 所有这些研究的目的是确定 介绍了手性液晶的现有理论观点， 建议他们可以扩展到适当描述高度 手性体系