Project Research Center for Fundamental Sciences, Graduate School of Science, Osaka University Harada Group
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Molecular recognition is seen with the bare eye

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

Photoswitchable gel assembly based on molecular recognition

Mixing and agitation of the α-CD gel and β-CD gel along with the trans-Azo gel resulted in the selective adherence of the α-CD gel to the trans-Azo gel. Exposure of a composite material of the α-CD-gel and trans-Azo gel to 365 nm light resulted in dissociation, and the resultant cis-Azo gel formed an assembly with the β-CD gel. The assembly of the α-CD gel with the trans-Azo gel switched completely to the assembly of the β-CD gel with the cis-Azo gel on light irradiation at 365 nm.

Yamaguchi, H.;Kobayashi, Y.; Kobayashi, R.; Takashima,Y.; Hashidzume, A.; Harada, A., Nature Communications 2012, 3, 603.
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