Abstract
We demonstrate a glucose‐sensing material based on the combination of photonic crystal templating and a molecular‐imprinting technique. In the presence of the target molecule glucose, poly(N‐isopropylacrylamide‐co‐2‐hydroxyethyl methacrylate) hydrogel with pendent phenylboronic acid groups was synthesized in the void of a poly(methyl methacrylate) (PMMA) colloidal crystal. After removing the PMMA photonic crystal template and glucose molecules, a 3D‐ordered porous covalently imprinted photonic crystal (CIPC) hydrogel was created. The unique 3D‐ordered porous hydrogel revealed optical changes in response to glucose concentration. At pH = 11 and 37∘C, the diffraction of CIPC redshifted from 725 nm to 880 nm in response to 20 mmol L−1 glucose. Due to the covalently imprinted recognizer, boronic acid group, the selectivity of the CIPC towards glucose over D‐ribose and L‐rhamnose was improved significantly.
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