Structure and morphology of helicene fibers
Structure and morphology of helicene fibers
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DOI：
10.1021/ja973366t
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发表时间：
1998-01-21
影响因子：
15
通讯作者：
Katz, TJ
中科院分区：
文献类型：
--
作者：
Lovinger, AJ;Nuckolls, C;Katz, TJ
非外消旋螺烯1当从熔体冷却时将其自身组织成宏观液晶纤维。透射电子显微镜分析表明，纤维由50-200 nm宽的薄片组成，每个薄片仅约100 nm。10 nm高。通过X射线和电子衍射分析表明，分子是在六角形填充柱组织。偏振光显微镜显示，柱是堆叠的，使得它们的长轴平行于纤维的长轴。在薄膜中，烷基侧链会像结晶烷烃一样进一步自我组织。
Nonracemic helicene 1 when cooled from the melt organizes itself into macroscopic liquid crystalline fibers. Transmission electron microscopic analysis shows that the fibers are comprised of lamellae 50-200 nm wide, each only ca. 10 nm high. Analyses by X-ray and electron diffraction demonstrate that the molecules are organized in hexagonally packed columns. Polarized light microscopy reveals that the columns are stacked so that their long axes parallel the long axes of the fibers. In ultrathin films, the alkyl side chains organize themselves further as in crystalline alkanes.