Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 40, Issue 14, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201900189
Keywords
dually cross-linked; sensors; small molecules; supramolecular hydrogels; surface plasmon resonance
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Dually cross-linked supramolecular hydrogels (DCSH) are designed to show responsive properties while maintaining the gel structure by introducing two different kinds of cross-links. This is realized by utilizing a photo-cross-linker for permanent cross-linking and beta-cyclodextrin (beta-CD) and ferrocene (Fc) as host-guest recognition pair. The DCSH shows increased swelling in the presence of the small target molecule adamantane amine (Ada). Ada can break the non-covalent bonding between beta-CD and Fc through competitive molecular guest interaction with beta-CD. By using a combination of surface plasmon resonance and optical waveguide spectroscopy, it is possible to use this behavior to construct a reversible sensor for specific small molecule detection.
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