Novel Electrooptic Materials Based on Dipolar Dielectrics: Molecular Compassess and Gyroscopes

本项目的目标是制备和表征一组基于单体单元的新型电光材料，这些单体单元与罗盘和陀螺仪同胚相关。 所需的分子结构具有在外部电场和/或磁场的影响下沿给定轴自由地沿着重新取向的结构屏蔽偶极。 用分子罗盘和陀螺仪构建的材料将基于1，4-双-[3-（9-三蝶基）丙炔基]-苯和1，4-双-三芳基丙炔基苯。 预期这些材料具有与分子晶体、塑料晶体和液晶的性质相关的性质。 这些材料将通过X射线晶体学、固体核磁共振、热分析、偏光显微镜和介电谱进行详细的分析。最近强光源的出现以及材料设计和电光现象领域的最新进展导致了光子学作为信息获取、存储、传输和处理的最有前途的技术的快速发展。 虽然永久偶极取向对于非线性光学光子学应用是期望的，但是还需要宏观系统，例如在非常短的时间尺度内响应于外部场的液晶。

The goal of this project is to prepare and characterize a set of novel electrooptic materials based on monomeric units that are homeomorphically related to compasses and gyroscopes. The desired molecular architectures have a structurally shielded dipole that is free to reorient along a given axis under the influence of external electric and/or magnetic fields. Materials built with molecular compasses and gyroscope will be based on 1, 4-bis-[3-(9-triptycyl) propynyl]-benzenes and 1,4-bus-triarylpropynyl benzenes. These materials are expected to have properties related to those of molecular crystals, plastic crystals and liquid crystals. The materials will be analyzed in detail by X-ray crystallography, solid state NMR, thermal analysis, polarizing microscopy, and dielectric spectroscopy.The recent availability of intense light sources and recent progress in the areas of materials design and electrooptical phenomena have led to the rapid development of photonics as the most promising technology for the acquisition, storage, transfer and processing of information. While permanent dipolar orientation is desirable for non-linear optical photonics applications, there is also a need for macroscopic systems such as liquid crystals which respond to external fields within very short time-scales.