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Reference type: Journal
Authors: Chen ZD, Shan XL, Kong Y
Article Title: Preparation of molecularly imprinted polypyrrole/Fe3O4 composite material and its application in recognition of tryptophan enantiomers.
Publication date: 2012
Journal: Chinese Journal of Chromatography
Volume: 30
Issue: (4)
Page numbers: 423-427.
DOI: 10.3724/SP.J.1123.2011.12055
Alternative URL: http://www.chrom-china.com/EN/abstract/abstract13119.shtml

Abstract: Ferrosoferric oxide (Fe3O4) magnetic material was first synthesized, and then the in-situ chemical polymerization of pyrrole was carried out on the surface of Fe3O4 by using pyrrole and L-tryptophan (L-Trp) as the functional monomer and templates, respectively. As a result, molecularly imprinted polypyrrole/Fe3O4 composite material was obtained. This composite material was separated from the solution because of its magnetic property. Polypyrrole in the composite was overoxidized in 1 mol/L NaOH solution by applying a potential of 1.0 V, and thus L-Trp templates were de-doped from the composite. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical methods were employed to characterize the composite. The solution containing L- or D-Trp was pumped through a porous ceramic tube packed with the composite, separately. High performance liquid chromatography (HPLC) was adopted for the detection of L- or D-Trp in the eluate, and the results indicated that the enrichment ability of the composite for L-Trp was almost 2 times of that of D-Trp. Therefore, the electro-magnetic composite material has potential applications as chromatographic stationary phase for chiral recognition.
Template and target information: L-tryptophan, L-Trp
Author keywords: polypyrrole, Fe3O4 composite material, Tryptophan, enantiomers, Recognition, chromatographic stationary phase

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