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Preparation of novel bovine hemoglobin surface-imprinted polystyrene nanoparticles with magnetic susceptibility

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Abstract

In this research, a surface imprinting strategy has been adopted in protein imprinting. Bovine hemoglobin surface-imprinted polystyrene (PS) nanoparticles with magnetic susceptibility have been synthesized through multistage core-shell polymerization system using 3-aminophenylboronic acid (APBA) as functional and cross-linking monomers. Superparamagnetic molecularly imprinted polystyrene nanospheres with poly(APBA) thin films have been synthesized and used for the first time for protein molecular imprinting in an aqueous solution. The magnetic susceptibility is imparted through the successful encapsulation of Fe3O4 nanoparticles. The morphology, adsorption, and recognition properties of superparamagnetic molecularly imprinted polymers (MIPs) have been investigated using transmission electron microscopy, X-ray diffraction, thermogravimetric analysis, and vibrating sample magnetometer. Rebinding experimental results show that poly(APBA) MIPs-coated superparamagnetic PS nanoparticles have high adsorption capacity for template protein bovine hemoglobin and comparatively low nonspecific adsorption. The imprinted superparamagnetic nanoparticles could easily reach the adsorption equilibrium and achieve magnetic separation in an external magnetic field, thus avoiding some problems of the bulk polymer.

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Authors and Affiliations

  1. College of Chemistry, Nankai University, Tianjin, 300071, China

    Lin Li, XiWen He, LangXing Chen & YuKui Zhang

  2. College of Pharmaceutical Sciences, Nankai University, Tianjin, 300071, China

    Lin Li

  3. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116011, China

    YuKui Zhang

Authors
  1. Lin Li
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  2. XiWen He
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  3. LangXing Chen
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  4. YuKui Zhang
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Corresponding author

Correspondence to LangXing Chen.

Additional information

Supported by the National High-Tech Research & Development Program of China (Grant No. 2007AA10Z432), the National Basic Research Program (Grant No. 2007CB914100), the National Natural Science Foundation of China (Grant Nos. 20675040 & 20875050), and the Natural Science Foundation of Tianjin (Grant No. 07JCYBJC00500)

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Li, L., He, X., Chen, L. et al. Preparation of novel bovine hemoglobin surface-imprinted polystyrene nanoparticles with magnetic susceptibility. Sci. China Ser. B-Chem. 52, 1402–1411 (2009). https://doi.org/10.1007/s11426-009-0182-0

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  • DOI: https://doi.org/10.1007/s11426-009-0182-0

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