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Electrochemical enantiorecognition of tryptophan enantiomers based on multi-walled carbon nanotubes–hydroxyethyl chitosan composite film

Abstract

A novel chiral electrochemical sensor based on hydroxyethyl chitosan (HECS) covalently binding with the carboxylic multi-walled carbon nanotubes (MWCNTs-COOH) was fabricated for discrimination of tryptophan (Trp) enantiomers, HECS preferably combined with L-Trp than D- Trp, Which was due to favorability of host-guest interactions between HECS and Trp enantiomers. As comparision, recognition efficiency was remarkable improved after hydroxyethyl groups were grafted onto chitosan (CS), which might be attributed to the formation of hydrogen bonds between Trp enantiomers and HECS. In addition, the small stereo-hindrance effect could play an important role in enantioselective discrimination.

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Publication details

The article was accepted on 07 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7AY01775H
Citation: Anal. Methods, 2017, Accepted Manuscript
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    Electrochemical enantiorecognition of tryptophan enantiomers based on multi-walled carbon nanotubes–hydroxyethyl chitosan composite film

    Z. Li, Z. Mo, R. Guo, S. Meng, R. Wang, H. Gao and X. Niu, Anal. Methods, 2017, Accepted Manuscript , DOI: 10.1039/C7AY01775H

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