Premium
Hydrogel Photonic Sensor for the Detection of 3‐Pyridinecarboxamide
Author(s) -
Yuan Yanxia,
Li Zhiliang,
Liu Yue,
Gao Jianping,
Pan Zeng,
Liu Yu
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201102001
Subject(s) - molecular imprinting , monomer , molecule , imprinting (psychology) , photonic crystal , diffraction , materials science , polymer , naked eye , chemistry , selectivity , optics , detection limit , optoelectronics , organic chemistry , chromatography , biochemistry , physics , catalysis , gene
Molecular imprinting is recognized as a powerful technique for preparing polymeric structures that contains tailor‐made recognition sites for certain molecules. By combining a responsive hydrogel photonic crystal and molecular imprinting of 3‐pyridinecarboxamide, polyacrylamide (PAM) imprinted photonic crystals (IPCs) with an inverse opal structure were prepared. They showed a rapid, recoverable, and selective response to 3‐pyridinecarboxamide, which was detected by measuring the diffraction peak. The position of the diffraction peak could be tuned by copolymerizing acrylamide (AM) with acrylic acid (AA), by changing the ratio of AM to AA, by adding N , N ′‐methylene bisacrylamide to the monomers, or by imprinting molecules to monomers. More interestingly, the change in the Bragg diffraction of the IPCs can be directly converted into a readable optical signal that is visible to the naked eye without any labeling treatment.