Self‐Assembly of a Low‐Symmetry Monodendron Containing Two Asymmetrically Linked Molecular Wedges
作者:Jānis Lejnieks、Xiaomin Zhu、Jingbo Wang、Ahmed Mourran、Helmut Keul、Martin Möller、Denis V. Anokhin、Dimitri A. Ivanov
DOI:10.1002/cphc.201000567
日期:2010.12.3
lattice in which the alkyl chains connected to different benzene rings form crystalline and amorphous domains. Upon cooling from the isotropic melt the compound exhibits a monotropic smectic mesophase. In 100‐nm‐thick films on a neutral substrate the structure loses its biaxiality, adopting a hexagonal columnar structure with the columns oriented parallel to the substrate. By contrast, in ultrathin films
在本文中,我们描述了从没食子酸乙酯开始的简单路线,合成了低对称性的单树枝状的3,4-双(十二烷氧基)-5- [3,4,5-三(十二烷氧基)苄氧基]苯甲酸酯,不需要任何保护基。通过同步加速器X射线散射和扫描力显微镜(SFM)研究了化合物在3D和2D中形成的自组装结构。在3D中,化合物形成具有斜方晶格,其中连接到不同的苯环的烷基链形成结晶和无定形结构域的稳定的晶相。从各向同性熔体冷却后,该化合物表现出单向性近晶中间相。在中性基板上的100nm厚的薄膜结构失去其双轴性,采用具有平行于衬底取向的列的六边形柱状结构。相比之下,