Field-induced molecular reorientation keeping a frustrated structure in an achiral bent-shaped liquid crystal
Field-induced molecular reorientation keeping a frustrated structure in an achiral bent-shaped liquid crystal
复制标题
场诱导分子重新取向在非手性弯曲形状液晶中保持受挫结构
DOI：
10.1039/a904774c
复制
发表时间：
1999
影响因子：
--
通讯作者：
A. Iida
中科院分区：
文献类型：
--
作者：
Y. Takanishi;Tatsuya Izumi;J. Watanabe;K. Ishikawa;H. Takezoe;A. Iida
通过X射线微束衍射和光学双折射测量，研究了具有两个介晶基元的双链亚烷基分子的受抑近晶相的层和分子取向结构。在X射线微束测量中，在没有电场的薄均匀池中仅观察到一个指示（002）的衍射峰，而通过施加电场也出现了对应于（101）和（101）的另外两个峰。此外，还发现，在施加场下的双折射大于没有场。这些结果导致的结论，分子重新取向，由于介电各向异性保持阻挫结构。
The layer and molecular orientational structures have been investigated by X-ray microbeam diffraction and optical birefringence measurements in the frustrated smectic phase of a bent-shaped molecule with two mesogens linked by an alkylene spacer. In the X-ray microbeam measurement, only one diffraction peak indicating (002) was observed in a thin homogeneous cell without an electric field, while two other peaks corresponding to (101) and (10text-decoration:underline'1) also appear by applying the field. Moreover, it was also found that the birefringence under an applied field is larger than that without the field. These results led to the conclusion that molecules reorient due to dielectric anisotropy keeping the frustrated structure.