论文标题
液晶相具有异常结构和由急性角弯曲分子形成的物理特性
Liquid crystal phases with unusual structures and physical properties formed by acute-angle bent-core molecules
论文作者
论文摘要
由1,7萘中心核心形成的急性角弯曲核（ABC）分子形成的液晶表现出有趣的相行为，列明相伴随着较差的其他相。在这项工作中，我们表征了ABC材料的物理特性，例如双折射，介电渗透率，弹性常数和表面比对，以及当前的X射线衍射和透射电子显微镜研究。类似于字母$λ$的ABC分子形状在单轴列相中产生一个非常小的弹力弹性常数，并导致形成四方位置有序的柱状相，该柱状相位由具有均匀的单轴导演的分子柱组成，单轴导演可以弯曲但不散落。
Liquid crystals formed by acute-angle bent-core (ABC) molecules with a 1,7 naphthalene central core show an intriguing phase behavior with the nematic phase accompanied by poorly understood additional phases. In this work, we characterize the physical properties of an ABC material, such as birefringence, dielectric permittivities, elastic constants, and surface alignment, and present X-ray diffraction and transmission electron microscopy studies of their ordering. The ABC molecular shape resembling the letter $λ$ yields a very small splay elastic constant in the uniaxial nematic phase and results in the formation of a tetragonal positionally ordered columnar phase consisting of molecular columns with a uniform uniaxial director that can be bent but not splayed.
