文献类型： 外文期刊
作者： Huang, Jiahao 1 ; Ren, He 2 ; Zhang, Rongchun 1 ; Wu, Lidong 4 ; Zhai, Yuanming 5 ; Meng, Qingyi 4 ; Wang, Jing 1 ; Su, Z 1 ;
作者机构： 1.South China Univ Technol, Sch Mol Sci & Engn, South China Adv Inst Soft Matter Sci & Technol, Guangzhou 510640, Peoples R China
2.Univ Akron, Dept Polymer Sci, Coll Polymer Sci & Polymer Engn, Akron, OH 44325 USA
3.Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
4.Chinese Acad Fishery Sci, Key Lab Control Qual & Safety Aquat Prod, Beijing 100141, Peoples R China
5.Sichuan Univ, Analyt & Testing Ctr, Chengdu 610064, Sichuan, Peoples R China
关键词： supramolecular self-assembly; tetrahedral; perylene bisimides; rigid conformation; three-dimensional
期刊名称：ACS NANO （ 影响因子：15.881； 五年影响因子：16.207 ）
ISSN： 1936-0851
年卷期： 2020 年 14 卷 7 期
页码：
收录情况： SCI
摘要： Recently, ordered structures constructed from rigid three-dimensional (3D) shaped polyhedra have been drawing general interest, with the tetrahedron being the simplest one but showing complicated assembly behaviors. Rigid tetrahedron building blocks have been shown to form quasicrystalline and crystalline phases with high packing fractions by both simulation and experiments. Nevertheless, the study of 3D tetrahedral building blocks is limited, especially in the field of supramolecular self-assembly. Here, we present an experimental study of rigid giant tetrahedral molecules constructed by attaching four bulky polyhedral oligomeric silsesquioxane (POSS) cages to a tetrahedral perylene bisimide (PBI) scaffold. Self-assembly of these giant tetrahedra is mediated by pi-pi interaction between the tetrahedral PBI-based scaffolds and their overall tetrahedral symmetry. A monolithic nearly centimeter-sized hexagonal supramolecular structure was observed in the giant tetrahedron with short flexible linkers between PBI and POSS cages, while a micrometer-sized crystalline helical structure formed in that with completely rigid aromatic linkers. Their significant difference in electrical conductivity could be explained by two completely different packing models of the giant tetrahedra.
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