Cucurbit[7]uril: A Simple Macrocyclic, pH-Triggered Hydrogelator Exhibiting Guest-Induced Stimuli-Responsive Behavior

Authors

  • Ilha Hwang,

    1. National Creative Research Initiative Center for Smart, Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea, Fax: (+82) 54-279-8129 http://css.postech.ac.kr
    Search for more papers by this author
  • Woo Sung Jeon Dr.,

    1. National Creative Research Initiative Center for Smart, Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea, Fax: (+82) 54-279-8129 http://css.postech.ac.kr
    Search for more papers by this author
  • Hee-Joon Kim Dr.,

    1. National Creative Research Initiative Center for Smart, Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea, Fax: (+82) 54-279-8129 http://css.postech.ac.kr
    2. Current address: Department of Applied Chemistry, Kumoh National Institute of Technology, 1 Yangho-dong, Gumi 730-701, Republic of Korea
    Search for more papers by this author
  • Dongwoo Kim Dr.,

    1. National Creative Research Initiative Center for Smart, Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea, Fax: (+82) 54-279-8129 http://css.postech.ac.kr
    Search for more papers by this author
  • Hyunuk Kim,

    1. National Creative Research Initiative Center for Smart, Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea, Fax: (+82) 54-279-8129 http://css.postech.ac.kr
    Search for more papers by this author
  • Narayanan Selvapalam Dr.,

    1. National Creative Research Initiative Center for Smart, Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea, Fax: (+82) 54-279-8129 http://css.postech.ac.kr
    Search for more papers by this author
  • Norifumi Fujita Dr.,

    1. Department of Chemistry & Biochemistry, Graduated School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
    Search for more papers by this author
  • Seiji Shinkai Prof. Dr.,

    1. Department of Chemistry & Biochemistry, Graduated School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
    Search for more papers by this author
  • Kimoon Kim Prof. Dr.

    1. National Creative Research Initiative Center for Smart, Supramolecules and Department of Chemistry, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang 790-784, Republic of Korea, Fax: (+82) 54-279-8129 http://css.postech.ac.kr
    Search for more papers by this author

  • We gratefully acknowledge the Creative Research Initiatives and BK 21 programs for support of this work. We also thank Prof. W.-C. Zin for helpful discussions and Prof. Jaheon Kim for helping us solve the X-ray crystal structure. The X-ray diffraction measurements were performed at the Pohang Accelerator Laboratory (Beamlines 3C2, 4C1, and 4A).

Abstract

original image

An der Peripherie nicht modifiziertes Cucurbit[7]uril, ein makrocyclischer Cavitand aus sieben Glycoluril-Einheiten, bildet ein Hydrogel. Diese Gelierung ist thermisch reversibel und pH-empfindlich und wird durch Alkalimetallionen verhindert. Die Zugabe einer geringen Gastmenge resultiert in einem stimulierbaren Gel-Sol-Übergang, der durch abwechselndes UV-Bestrahlen und Erwärmen reversibel ist (siehe Bild).

Ancillary