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Cellulose

, Volume 25, Issue 7, pp 3861–3871 | Cite as

Electrochemical chiral sensor based on cellulose nanocrystals and multiwall carbon nanotubes for discrimination of tryptophan enantiomers

  • Yahui Zhang
  • Gang Liu
  • Xue Yao
  • Shanmin Gao
  • Jiwei Xie
  • Hui Xu
  • Ning Lin
Original Paper
  • 245 Downloads

Abstract

Based on the natural right-handed chirality of cellulose nanocrystals (CNCs) and conductive amplification of multiwall carbon nanotubes (MWCNTs), we designed a composite chiral sensor to discriminate the tryptophan (Trp) enantiomers with the advantages of rapid recognition, high sensitivity and stability. In comparison with previous reports, the developed composite sensor from s-CNC (CNC from H2SO4-hydrolysis)/MWCNT nanoparticles exhibited high enantiospecificity to l-Trp, with the promising sensitivity of 3.5-fold of the peak current ratio for l-Trp to d-Trp at the optimal conditions (pH 7.0, 25 °C). Two kinds of CNCs (s-CNCs from H2SO4-hydrolysis and h-CNCs from HCl-hydrolysis) bearing different surface properties (groups and charges) exhibited different effects on the affinity to Trp enantiomers and resultant chiral recognition influence. The synergetic effect of chiral recognition from cellulose nanocrystals and signal amplification from multiwall carbon nanotubes offered an easy-handling and effective electrochemical approach for isomers discrimination to realize the chiral recognition of Trp enantiomers.

Keywords

Electrochemical sensor Cellulose nanocrystals Tryptophan enantiomers Enantioselectivity 

Notes

Acknowledgments

This work was supported by the National Science Foundation of China (51603159) and the Natural Science Foundation of Shandong Province (ZR2016BM27). The authors also wished to acknowledge the financial support of Youth Chenguang Program of Science and Technology in Wuhan (2016070204010102) for this work.

Supplementary material

10570_2018_1816_MOESM1_ESM.docx (1.7 mb)
Supplementary material 1 (DOCX 1743 kb)

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Chemistry and Materials ScienceLudong UniversityYantaiPeople’s Republic of China
  2. 2.School of Chemistry, Chemical Engineering and Life SciencesWuhan University of TechnologyWuhanPeople’s Republic of China

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