Size-Complementary Rotaxane Cross-Linking for the Stabilization and Degradation of a Supramolecular Network

Authors

  • Dr. Yasuhiro Kohsaka,

    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 (H-126), O-okayama, Meguro-ku, Tokyo 152-8552 (Japan), Fax: (+81) 3-5734-2888
    Search for more papers by this author
  • Dr. Kazuko Nakazono,

    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 (H-126), O-okayama, Meguro-ku, Tokyo 152-8552 (Japan), Fax: (+81) 3-5734-2888
    Search for more papers by this author
  • Dr. Yasuhito Koyama,

    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 (H-126), O-okayama, Meguro-ku, Tokyo 152-8552 (Japan), Fax: (+81) 3-5734-2888
    Search for more papers by this author
  • Prof. Dr. Shigeo Asai,

    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 (H-126), O-okayama, Meguro-ku, Tokyo 152-8552 (Japan), Fax: (+81) 3-5734-2888
    Search for more papers by this author
  • Prof. Dr. Toshikazu Takata

    Corresponding author
    1. Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 (H-126), O-okayama, Meguro-ku, Tokyo 152-8552 (Japan), Fax: (+81) 3-5734-2888
    • Department of Organic and Polymeric Materials, Tokyo Institute of Technology, 2-12-1 (H-126), O-okayama, Meguro-ku, Tokyo 152-8552 (Japan), Fax: (+81) 3-5734-2888
    Search for more papers by this author

  • This work was financially supported by a Grant-in-Aid for Scientific Research (No. 21106508, Soft Interfaces) from MEXT (Japan). JSPS Fellowships for Young Scientists (Y.K.) and the Circle for the Promotion of Science and Engineering (Y.K.) are gratefully acknowledged. We thank Dr. Shuichi Akasaka for his help in the dynamic mechanical analysis.

Abstract

original image

Break it down: Gels formed from rotaxane cross-linkers with end groups that are size-complementary to the macrocyclic cavity of wheel components (see picture) were prepared. The network structure was maintained in polar organic solvents or in the presence of a base to prevent hydrogen bonding. Anion exchange enabled the selective and efficient de-cross-linking of the gels.

Ancillary