Preparation and application of 2-chlorophenol molecularly imprinted photonic crystal hydrogel sensor

In this paper, we prepared a novel molecularly imprinted photonic crystal hydrogels sensor (MIPCH) for sensitive and specific recognition of 2-Chlorophenol (2-CP). We can obtained the 2-CP MIPCH sensor with inverse opal stucture by useing 3 D SiO2 photonic crystal as template, 2-CP as imprinted molecules, methanol as solvent, methacrylic acid (MAA) as functional monomers, ethylene glycol dimethyl acrylate (EGDMA) as cross-linker, 2,2- diethoxyacetophenone (DEAP) as initiator, after initiate polymerization by 365 nm UV lamp, use the 4% HF solution removed 3 D colloidal crystal template and the imprinted molecules were removed by 0.015 mol/L NaOH solution. The experimental results showed that 2-CP MIPCH sensor had excellent response behavior and specific recognition ability for 2-CP. When the 2-CP MIPCH sensor recognizes 2-CP, the Bragg diffraction peak gradually blue shift. And when the concentration of 2-CP increases from 0 to 10(-3 )mol/L, the maximum blue shift of the Bragg diffraction peak is 35 nm, the response time is only 30 minutes, and the limit of detection is 10(-9 )mol/L. A linear relationship was found between Delta lambda and the logarithm value of the 2-CP concentration lgc in the range from 10(-8 )mol/L to 10(-4 )mol/L. While in the analogues of 2-CP such as phenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol, the Bragg diffraction peak position was only a slight change. The 2-CP MIPCH sensor has the advantages of high sensitivity, specific recognition and reusable performance. The sensor was applied to the determination of 2-CP in tap water with satisfactory results.

Automated summary

A novel molecularly imprinted photonic crystal hydrogels sensor (MIPCH) was prepared for sensitive and specific recognition of 2-Chlorophenol (2-CP). The sensor demonstrated excellent response behavior and specific recognition ability for 2-CP, with high sensitivity, specific recognition, and reusable performance. The sensor was successfully applied in the determination of 2-CP in tap water with satisfactory results.