1. Binding characteristics of homogeneous molecularly imprinted polymers for acyclovir using an (acceptor–donor–donor)—(donor–acceptor–acceptor) hydrogen-bond strategy, and analytical applications for serum samples
- Author
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Guiming Peng, Lei Tan, Ganquan Wang, Chengcheng Kang, Suqin Wu, and Youwen Tang
- Subjects
Polymers ,viruses ,Acyclovir ,Biochemistry ,High-performance liquid chromatography ,Analytical Chemistry ,Nucleobase ,Molecular Imprinting ,Limit of Detection ,Humans ,Solid phase extraction ,Nuclear Magnetic Resonance, Biomolecular ,Chromatography, High Pressure Liquid ,Detection limit ,Chromatography ,Hydrogen bond ,Chemistry ,Solid Phase Extraction ,Organic Chemistry ,Molecularly imprinted polymer ,Reproducibility of Results ,virus diseases ,Hydrogen Bonding ,General Medicine ,Acceptor ,Microspheres ,Proton NMR - Abstract
This paper demonstrates a novel approach to assembling homogeneous molecularly imprinted polymers (MIPs) based on mimicking multiple hydrogen bonds between nucleotide bases by preparing acyclovir (ACV) as a template and using coatings grafted on silica supports. (1)H NMR studies confirmed the AAD-DDA (A for acceptor, D for donor) hydrogen-bond array between template and functional monomer, while the resultant monodisperse molecularly imprinted microspheres (MIMs) were evaluated using a binding experiment, high performance liquid chromatography (HPLC), and solid phase extraction. The Langmuir isothermal model and the Langmuir-Freundlich isothermal model suggest that ACV-MIMs have more homogeneous binding sites than MIPs prepared through normal imprinting. In contrast to previous MIP-HPLC columns, there were no apparent tailings for the ACV peaks, and ACV-MIMs had excellent specific binding properties with a Ka peak of 3.44 × 10(5)M(-1). A complete baseline separation is obtained for ACV and structurally similar compounds. This work also successfully used MIMs as a specific sorbent for capturing ACV from serum samples. The detection limit and mean recovery of ACV was 1.8 ng/mL(-1) and 95.6%, respectively, for molecularly imprinted solid phase extraction coupled with HPLC. To our knowledge, this was the first example of MIPs using AAD-DDA hydrogen bonds.
- Published
- 2013
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