4.6 Article

Photochromic supramolecular photonic crystals based on host-guest interactions

Journal

JOURNAL OF MATERIALS CHEMISTRY C
Volume 9, Issue 47, Pages 16925-16928

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc04609h

Keywords

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Funding

  1. MOST of China [2019YFA0709200, 2016YFA0200800]
  2. National Natural Science Foundation of China [21773276]
  3. NSAF [u1930205]

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The novel photo-responsive supramolecular hydrogel inverse opal material described in this communication can shift its structural color towards blue or red under blue or red light irradiation, respectively.
A novel photo-responsive supramolecular hydrogel inverse opal material was described in this communication. The inverse opal material contains a host component beta-cyclodextrin (beta-CD) and a guest component 3-(acryloyl)amino-1,1 ',5,5 '-tetramethoxyazobenzen (MAzo). trans-MAzo has stronger association with beta-CD than cis-MAzo. Under the irradiation of blue light (475 nm), the MAzo moieties transformed to the trans-configuration, resulting in blue-shift of the structural colour. In contrast, being irradiated with red light (620 nm) regulated MAzo to the cis-configuration and dissociated the host-guest pair; subsequently, the structural colour shifted to red. Therefore, in this system, the variation of the structural colour is in correspondence with the wavelength trend of the incoming light.

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