We have synthesised an inverse opal hydrogel functionalised with a thiourea moiety as an anion recognition site. The resulting hydrogel showed remarkable changes of its structural colour with respect to acetate and bicarbonate ions selectively in aqueous solution, indicating a potential as colorimetric sensing materials for hydrophilic anions.
S. Kado, H. Otani, Y. Nakahara and K. Kimura, Chem. Commun., 2013, 49, 886 DOI: 10.1039/C2CC38052H
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