Reversible Photochemical Conversion of Helicity in Self-Assembled Nanofibers from a 1,ω-Thymidylic Acid Appended Bolaamphiphile

Authors

  • Rika Iwaura Dr.,

    1. Nanoarchitectonics Research Center (NARC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan, Fax: (+81) 29-861-4545
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  • Toshimi Shimizu Dr.

    1. Nanoarchitectonics Research Center (NARC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan, Fax: (+81) 29-861-4545
    2. SORST, Japan Science and Technology Agency (JST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
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Abstract

original image

Light twisting and untwisting: UV light was found to drive reversible helical-nanofiber formation based on the photodimerization and photodissociation of the thymine residue in the 1,ω-thymidylic acid appended bolaamphiphile. 1H NMR spectroscopy revealed that UV irradiation of the self-assembled nanofibers induces a helical structure through the formation of a cis–syn isomer of the thymine moiety.

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