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Citation: LIU Zhehan, ZHANG Xin, LIANG Axin, SUN Liquan, LUO Aiqin. Preparation and application of melamine molecularly imprinted photonic crystal hydrogel sensor[J]. Chinese Journal of Chromatography, ;2019, 37(3): 287-292. doi: 10.3724/SP.J.1123.2018.11017 shu

Preparation and application of melamine molecularly imprinted photonic crystal hydrogel sensor

School of Life Science, Beijing Institute of Technology, Beijing 100081, China

Received Date: 11 November 2018

In this paper, molecularly imprinted photonic crystal hydrogels (MIPHs) were prepared by combining photonic crystals with molecular imprinting technology. The MIPHs were used as optical sensors for the rapid reorganization and detection of melamine in water samples. In this experiment, melamine was used as a template molecule, and the MIPHs were prepared by successive self-assembly, polymerization, and template removal. Morphological characterization by scanning electron microscopy (SEM) showed that the MIPHs possessed a highly ordered three-dimensional (3D) macroporous structure containing nanocavities. As optical sensors, the MIPHs were able to transform molecular recognition events into fluorescence signals for rapid and highly selective and sensitive recognition of the target molecule. Based on color changes of the MIPHs, the target analyte could be quickly identified by analysis with image software or even by observation with the naked eye. Under optimal conditions, the Bragg diffraction peak of the MIPHs shifted from 563 to 608 nm when exposed to melamine in mass concentrations of 10^-11 to 10^-6mol/L, whereas there were no obvious peak shifts when it was exposed to structural analogues of melamine.
- molecularly imprinting,
- photonic crystal,
- melamine,
- optical sensing
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