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Reference type: Journal
Authors: Zhou YX, Yu B, Levon K
Article Title: Potentiometric sensing of chiral amino acids.
Publication date: 2003
Journal: Chemistry of Materials
Volume: 15
Issue: (14)
Page numbers: 2774-2779.
DOI: 10.1021/cm030060e

Abstract: Recognition of enantiomers of amino acids was achieved with potentiometric measurements using chiral sensors constructed by a surface imprinting technique. The sensors exhibited recognition properties toward one isomer of racemic N- carbobenzoxy-aspartic acids (N-CBZ-Asp) without any preseparation processes. The sensors translated the enantioselective recognition event into a potential change by detecting optically active N-CBZ-Asp in a concentration range of 5.0 x 10(-6)-1.2 x 10(-2) M. The enantiomeric selectivity coefficients of the sensors for the counter isomers were in the range of 4.0 x 10(-3)-9.0 x 10(-3). The sensitivity of these sensors is assigned to the specific surface modification of the electrodes resulting in chiral recognition and to the coupled transduction activity of the sensor

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