Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University Harada Group
  English

Supramolecular Actuator Based on Cyclodextrins


Light-Responsive Supramolecular Gel
Redox-Responsive Supramolecular Gel
Light-Responsive Topological Gel

In biological systems, molecular recognition on a microscale is integrated to macroscale to achieve reversible motion in our body, as represented by our muscle. We are inspired by such intelligent systems.
Two structural approaches may realize supramolecular actuators through host–guest interactions: a method with a linear main chain and one with a side chain in the polymer structure.  Our research employs the polymer side chain method because various functions are relatively easy to be introduced into materials.  Supramolecular gel are based on integrating host–guest interactions on the polymer side chains.  The association and dissociation of inclusion complexes as crosslinking units on the polymer side chains demonstrate contraction and expansion motions due to changes in the crosslinking density.  Topological gel is mechanically crosslinked by molecules.  The drive mechanism, which involves a sliding motion in the [c2]daisy chain, is completely different from previously reported stimuli-responsive actuators, such as polymer gels, liquid crystalline elastomers, conjugated polymers, and carbon nanotubes.


Light-Responsive Supramolecular Gel

Light-Responsive Supramolecular Gel A light-responsive artificial muscle based on the inclusion complex between α-cyclodextrin and azobenzene.

(Takashima, Y.; Hatanaka, S.; Otsubo, M.; Nakahata, M.; Kakuta, T.; Hashidzume, A.; Yamaguchi, H.; Harada, A., Nat. Commun. 2012, 3, 1270.)

このページのコンテンツには、Adobe Flash Player の最新バージョンが必要です。

Adobe Flash Player を取得

このページのコンテンツには、Adobe Flash Player の最新バージョンが必要です。

Adobe Flash Player を取得

   

Return to Top