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

doi:10.7503/cjcu20160861

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

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

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:

O656
O648

TrendMD:

YOU Aimei, NI Xinjiong, CAO Yuhua, CAO Guangqun. Colloidal Magnetically Assembled Molecularly Imprinted Photonic Crystals and L-Phenylalanine Sensing^†[J]. Chem. J. Chinese Universities, 2017, 38(2): 182.

Figures/Tables 4

Scheme 1 Schematic illustration of the preparation of CMA-MIPCs sensor

Fig.1 TEM images of MMIPs(A), MNIPs(B) and CMA-MIPCs(C)

Fig.2 Response behavior of CMA-MIPCs to a series of concentrations of L-Phe solutions characterized by photograph(A—F) and the reflection spectra(G) (A) Blank MMIPs; (B) blank CMA-MIPCs; (C) 6.0×10-7 mol/L L-Phe; (D) 6.0×10-6 mol/L L-Phe; (E) 6.0×10-5 mol/L L-Phe; (F) 6.0×10-4 mol/L L-Phe.

Fig.3 Changes of particle size and zeta potential in response to L-Phe concentration

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

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