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A Liquid-Crystalline Bistable [2]Rotaxane

Authors

  • Ivan Aprahamian Dr.,

    1. California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA, Fax: (+1) 310-206-5621
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  • Takuma Yasuda Dr.,

    1. Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan, Fax: (+81) 3-5841-8661
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  • Taichi Ikeda Dr.,

    1. California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA, Fax: (+1) 310-206-5621
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  • Sourav Saha Dr.,

    1. California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA, Fax: (+1) 310-206-5621
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  • William R. Dichtel Dr.,

    1. California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA, Fax: (+1) 310-206-5621
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  • Kyosuke Isoda,

    1. Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan, Fax: (+81) 3-5841-8661
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  • Takashi Kato Prof.,

    1. Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan, Fax: (+81) 3-5841-8661
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  • J. Fraser Stoddart Prof.

    1. California NanoSystems Institute and Department of Chemistry and Biochemistry, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA, Fax: (+1) 310-206-5621
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  • The work at UCLA was supported by the Microelectronics Advanced Research Corporation (MARCO) and its focus center on Functional Engineered Architectonics (FENA), the Defense Advanced Research Project Agency (DARPA), and the Center for Nanoscale Innovation for Defense (CNID). The research at the University of Tokyo was supported by a Grant-in-Aid for Creative Scientific Research of “Invention of Conjugated Electronic Structures and Novel Functions” (no. 16GS0209) and for Scientific Research (B) from the Japan Society for the Promotion of Science (JSPS).

Abstract

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Entering a new phase: Mesogenic stoppers (purple) at the ends of the rod section of a switchable donor–acceptor [2]rotaxane induce the formation of a smectic A liquid-crystalline (LC) phase over a wide temperature range. The bistable [2]rotaxane which contains a tetracationic cyclophane (blue), a tetrathiafulvalene unit (green), and a 1,5-dioxynaphthalene unit (red) self-assembles into a LC phase with a layer spacing of about 8 nm (see picture).

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