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Enantiomers of Single Chirality Nanotube as Chiral Recognition Interface for Enhanced Electrochemical Chiral Analysis
journal contribution
posted on 2019-01-15, 00:00 authored by Chunling Pu, Yunxia Xu, Qi Liu, Anwei Zhu, Guoyue ShiAlthough
separation of single-walled carbon nanotubes (SWCNTs)
according to their helicity and handedness has been attracting tremendous
interest recently, exploration of the left- and right-handed SWCNT
enantiomers (defined as “M” and “P”) to
chiral sensing still remains in the early stage. Here we presented
a new electrochemical sensor for chiral discrimination, which for
the first time amplified the chiral selection on the electrode surface
based on the left- or right-handed semiconducting SWCNT enantiomers
with (6,5)-enriched chirality. The enantioselectivity was demonstrated
by different peak current response to analyte enantiomers, observed
in differential pulse voltammogram (DPV). Chiral distinguishing might
be a result of the formation of an efficient chiral nanospace originating
from the high purity of single enantiomer of (6,5) SWCNT. The obtained
chiral electrodes were also applied to determine the enantiomeric
excess (ee) of DOPA. There was a good linear relationship between
DPV peak currents and % ee of l-DOPA. This study is the first
example showing how the structure of chiral SWCNTs influences electrochemical
chiral recognition.
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Keywords
semiconducting SWCNT enantiomersChiral Recognition Interfacechiral SWCNTs influences electrochemical chiral recognitionSingle Chirality Nanotubesingle-walled carbon nanotubespulse voltammogramEnhanced Electrochemical Chiral Analysiselectrochemical sensorchiral nanospaceDOPAelectrode surfaceSWCNT enantiomerschiral electrodesDPV peak currentsanalyte enantiomerschiral selectionchiral discrimination
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