Nanostructural polymorphism in the low-birefringence chiral phase of an achiral bent-shaped dimer
Nanostructural polymorphism in the low-birefringence chiral phase of an achiral bent-shaped dimer
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发表时间：
2022-10
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通讯作者：
K. Le;Michael R. Tuchband;H. Iwayama;Y. Takanishi;N. Clark;F. Araoka
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作者：
K. Le;Michael R. Tuchband;H. Iwayama;Y. Takanishi;N. Clark;F. Araoka
多态是指一个物种可以以多种离散的形式存在的现象，在自然界中很常见，如动物物种的毛发颜色，树木物种的花色，以及人类的血型等等。在材料科学中，它是指一种固体可以以多种形式存在，具有不同的晶体结构。然而，在液晶领域，多晶性很难找到，因为由于它们的流体性质或部分流体性质，不连续的结构变化基本上是不可能的。在这里，我们表明，多年来一直被归类为不同相的B4和DC相，根据它们的纳米结构，基于对单一化合物--柔性弯曲型二聚体的研究，将它们联系在一起。周围的溶剂是帮助二聚体分子在介观尺度上变形和采用不同超分子结构的关键。此外，我们偶然发现了一种新的类似纳米管的
Polymorphism, the phenomenon that a species can exist in many discrete forms, is common in nature, such as hair colors in an animal species, flower colors in a tree species, and blood types in humans, etc. In materials science, it refers to a solid that can exist in multiple forms with different crystalline structures. In the liquid crystals field, however, polymorphism is hard to find because a discontinuous structural variation is basically impossible because of their fluid or partially fluid nature. Herein we show that the B4 and DC phases that for many years have been classified as distinctive phases are connected, in terms of their nano-architectures, based on the study of a single compound, a flexible bent-shaped dimer. The surrounding solvent is the key to assisting the dimeric molecules in morphing and adopting different supramolecular structures at the mesoscale. Furthermore, we accidentally find a novel nanotube-like