沿柱状轴具有自发极化的柱状液晶。

Columnar liquid crystal with a spontaneous polarization along the columnar axis.

机构信息

School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

出版信息

J Am Chem Soc. 2010 Jun 30;132(25):8530-1. doi: 10.1021/ja101866e.

PMID:20527880

Abstract

A fan-shaped molecule (2), carrying hydrogen-bonding amide groups in proximity to its polar aromatic core, self-assembles into a columnar liquid crystalline mesophase, which unprecedentedly possesses a spontaneous macroscopic polarization along the columnar axis. Due to its polar nature, the mesophase displays a signal of second harmonic generation (SHG), which disappears on phase transition to an isotropic melt and then retrieves its original intensity on subsequent cooling.

摘要

一种扇形分子（2），其氢键酰胺基团接近其极性芳香核，自组装成柱状液晶介相，该介相前所未有地沿柱状轴具有自发宏观极化。由于其极性，该介相显示出二次谐波产生（SHG）的信号，该信号在向各向同性熔体的相变时消失，然后在随后的冷却时恢复其原始强度。