Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (2): 182.doi: 10.7503/cjcu20160861

• Analytical Chemistry • Previous Articles     Next Articles

Colloidal Magnetically Assembled Molecularly Imprinted Photonic Crystals and L-Phenylalanine Sensing

YOU Aimei, NI Xinjiong, CAO Yuhua*(), CAO Guangqun   

  1. The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education,School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
  • Received:2016-11-30 Online:2017-02-10 Published:2017-01-21
  • Contact: CAO Yuhua E-mail:yuhuacao64@gmail.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21405133) and the Postgraduate Innovation Project of Jiangsu Province, China(No.KYLX16_0786)

Abstract:

A colloidal magnetically assembled molecularly imprinted photonic crystals(CMA-MIPCs) with high sensitivity, strong specificity and rapid responsiveness for L-phenylalanine(L-Phe) was developed by combing a molecular imprinting technique with colloidal magnetically assembled photonic crystals. The magnetic assembly process was rapid and reversible. L-Phe magnetic molecularly imprinted nanoparticles(MMIPs) that prepared by miniemulsion polymerization were with a uniform spherical morphology and distinct core/shell structure, the average particle size of MMIPs was 104.3 nm. The CMA-MIPCs could directly transmitted the stimuli from the adsorption of different concentrations L-Phe into visual readable optical signals. The diffraction color changed from purple to orange as increasing the L-Phe concentration from 6.0×10-7 mol/L to 6.0×10-4 mol/L. The largest Bragg diffraction wavelength redshift range could reach 181 nm and the sensing time was 1 min. In addition, CMA-MIPCs showed no response to the structural analogues L-Tyr and L-Trp, which indicated that CMA-MIPCs possessed a good selectivity.

Key words: Colloidal photonic crystals, Magnetic assembly, Molecularly imprinting, L-Phenylalanine

CLC Number: 

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