4.8 Article

Synthesis, self-assembly, and switching of one-dimensional nanostructures from new crowded aromatics

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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 125, 期 27, 页码 8264-8269

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AMER CHEMICAL SOC
DOI: 10.1021/ja034783a

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This study outlines a versatile and expeditious synthesis of the first derivatives of a new class of benzene that is substituted with both three amide and three alkyne substituents. Sparsely covered monolayer films, made through spin-casting, reveal one-dimensional nanostructures that can be visualized with atomic force microscopy. In bulk, synchrotron X-ray diffraction and polarized light microscopy show that these nanostructured columns assemble further into a two-dimensional liquid crystalline phase. The birefringence of this phase can be switched by application of an electric field. The half-time for the liquid crystalline phase to switch is very fast and proportional to the applied voltage.

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