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Reference type: Journal
Authors: Yang JP, Yu Y, Wu DT, Tao YX, Deng LH, Kong Y
Article Title: Coinduction of a Chiral Microenvironment in Polypyrrole by Overoxidation and Camphorsulfonic Acid for Electrochemical Chirality Sensing.
Publication date: 2018
Journal: Analytical Chemistry
Volume: 90
Issue: (15)
Page numbers: 9551-9558.
DOI: 10.1021/acs.analchem.8b02269

Abstract: Polypyrrole (PPy) was synthesized by a galvanostatic method using (1S)-(+)-10-camphorsulfonic acid ((+)-CSA) as the dopant, and the produced PPy was further overoxidized in a solution of (+)-CSA. A chiral microenvironment was successfully formed in the overoxidized PPy (OPPy) as a result of the synergistic effects of overoxidation and (+)-CSA, resulting in a twisted helical architecture of the OPPy chains. The formation of optically active OPPy was confirmed from aspects of its morphology (SEM and AFM) and circular-dichroism (CD) spectra. Finally, an electrochemical chirality sensor was fabricated on the basis of the resultant OPPy, which exhibited excellent biomolecular homochirality in the discrimination of tryptophan (Trp) enantiomers
Template and target information: (1S)-(+)-10-camphorsulfonic acid, (+)-CSA, tryptophan, Trp

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