Narrowing Segments of Helical Carbon Nanotubes with Curved Aromatic Panels
Narrowing Segments of Helical Carbon Nanotubes with Curved Aromatic Panels
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DOI：
10.1002/anie.201902893
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发表时间：
2019-05-27
影响因子：
16.6
通讯作者：
Isobe, Hiroyuki
中科院分区：
文献类型：
--
作者：
Kogashi, Kanako;Matsuno, Taisuke;Isobe, Hiroyuki
利用铂催化的大环化反应，通过亚芳基嵌段的组装，合成了直径为1nm的刚性分子圆柱体。通过在侧边添加两个苯并基团来扭曲先前参与四聚体大环化的苯并亚甲基面板，以形成二苯并苯并亚甲基，这使得参与面板的数量减少到三个。因此，得到了范围较窄的亚环屈烯同系物。窄化的手性柱体具有宽度依赖的手性光学性质。磁跃迁偶极矩由圆柱上局部电跃迁偶极矩形成的环形电流状圆的半径决定。
Rigid molecular cylinders with a 1nm diameter were synthesized by assembling arylene panels with Pt-mediated macrocylization. Chrysenylene panels that previously participated in tetrameric macrocyclization were contorted by the addition of two benzo groups on the sides to form dibenzochrysenylene, which allowed for a reduction in the numbers of participating panels to three. Consequently, narrowed cyclochrysenylene congeners were obtained. The narrowed chiral cylinders possessed width-dependent chiroptical properties. The magnetic transition dipole moment was dictated by the radius of a ring-current-like circle that was formed by local electric transition dipole moments on the cylinder.