Macroscopic self-assembly through molecularrecognition
	Photoswitchable gel assembly based on molecular recognition
	Switching of macroscopic molecular recognition selectivity using a mixed solvent system
	Temperature-Sensitive Macroscopic Assembly Based on Molecular Recognition
	pH-Responsive Self-Assembly by Molecular Recognition on a Macroscopic Scale
	Reversible self-assembly of gels through metal-ligand interactions
	Aｎ ion-responsive gel sticking to a target surface

Aｎ ion-responsive gel sticking to a target surface

We developed a polymer hydrogel, CDbpy gel. The gel was modified with both cyclodextrin (CD), a cyclic oligosaccharide with molecular recognition ability, and 2,2´-bipyridyl (bpy), a metal-ion-responsive unit.
The CD-bpy gel exhibited surface-selective adhesion property based on molecular recognition by CD, only in the presence of metal ions. Furthermore, adhesion property can be controlled by the kinds of metal ions, depending on the efficiency of metal-bpy complexes in cross-linking. This result is the world’s first achievement that controlled chemically-selective adhesion based on host-guest interactions by metal ions as independent chemical stimuli.

Nakamura, T.; Takashima, Y.; Hashidzume, A.; Yamaguchi, H.; Harada, A., Nature Communications 2014,5, 4622.
(DOI: 10.1038/ncomms5622)

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