Self-Assembled Helical Nanofibers Made of Achiral Molecular Disks Having Molecular Adapter
Self-Assembled Helical Nanofibers Made of Achiral Molecular Disks Having Molecular Adapter
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DOI：
10.1021/cm102276a
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发表时间：
2010-10-26
影响因子：
8.6
通讯作者：
Shirai, Hirofusa
中科院分区：
文献类型：
--
作者：
Kimura, Mutsumi;Hatanaka, Tatsuya;Shirai, Hirofusa
通过透射电子显微镜（TEM）和原子力显微镜（AFM）发现具有一个咪唑单元的非手性盘状分子（2）组装成具有10 - 100 nm宽度的长且扭曲的纳米级纤维。化合物2通过咪唑单元的空间位阻效应在一维叠层的形成过程中导致自发的手性对称性破缺。2中的咪唑作为分子适配器形成氢键并积累金属离子。2与苯三甲酸通过氢键形成的超分子结构具有热致液晶性质。通过银离子的光还原作用在自组装纳米纤维上沉积银纳米粒子。
An achiral disk-shaped molecule (2) having one imidazole unit was found to be assembled into long and twisted nanoscopic fibers having 10 - 100 nm width as shown by transmission electron microscopy (TEM) and atomic force microscope (AFM). Compound 2 leads to spontaneous chiral symmetry breaking through the steric effect of imidazole units during the formation of one-dimensional stacks. The imidazole in 2 acts as a molecular adaptor to form hydrogen bonds and accumulate metal ions. The supramolecular connection of 2 with benzene-1,3,5-tricarboxylic acid through the hydrogen bonds exhibited a thermotropic liquid crystalline properties. Silver nanopartidies were deposited onto the self-assembled nanofibers by the photoreduction of silver ions.