Nuclear Magnetic Resonance Study of Liquid Crystals

9700680冯这项计划涉及进一步发展和实施新的核磁共振技术，以及将这些技术应用于研究目前有兴趣的液晶，即铁电和反铁电系统。核磁共振数据将与傅里叶变换红外(FTIR)结果结合起来，通过与科罗拉多大学的同事合作产生。这种综合的方法将被用来发展一种理论建模方法，这将有助于理解分子构象和相互作用对液晶相行为的影响，并可能有助于形成新的低粘度向列相混合物。新的液晶体系的合成和性能在许多应用领域发挥着越来越重要的作用，其中包括用于红外和微波液晶调制器的新材料，以及快速切换液晶显示器。此外，由于为优化某些材料性能而配制的液晶混合物的相行为通常是复杂和不可预测的，这些研究的重点应该会大大促进这些体系在工业上的使用。***

9700680 Fung This project involves the further development and implementation of new nuclear magnetic resonance (NMR) techniques and their application to the study of liquid crystals of current interest, viz., ferroelectric and antoferroelectric systems. The NMR data will be combined with Fourier Transform Infrared (FTIR) results to be generated through a collaboration with colleagues at the University of Colorado. This comprehensive approach will be used to advance a theoretical modeling approach that will contribute to the understanding of molecular conformations and interactions on the phase behavior of liquid crystals, and perhaps to the formulation of new low-viscosity nematic mixtures. %%% The synthesis and properties of new liquid crystal systems are playing an increasingly important role in advancing a number of applications areas that include new materials for infrared and microwave liquid crystal modulators, and fast-switching liquid crystal displays. Furthermore, since the phase behavior of liquid crystal mixtures formulated to optimize certain materials properties is often complicated and unpredictable, the focus of these studies should advance significantly the use of these systems for industrial uses. ***