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Title: Potentiometric discrimination of fluoro- and chlorophenol isomers based on the host functionality of calix[4]pyrrole at liquid membrane surfaces
Authors: Piotrowski, T ×
Radecka, H
Radecki, J
Depraetere, S
Dehaen, Wim #
Issue Date: Jan-2002
Publisher: Marcel dekker inc
Series Title: Analytical Letters vol:35 issue:12 pages:1895-1906
Abstract: This work presents a study on the generation of an "anionic" potentiometric response of a liquid polymeric membrane based on calix[4]pyrrole towards neutral chloro- and fluorophenol isomers. The results show that a calix[4]pyrrole membrane is able to recognize chloro and fluoro derivatives of phenols, and discriminate between ortho-, meta-, and para-isomers of chlorophenol. The mechanism of molecular recognition relies on the formation of a supramolecular complex between a phenolic guest and the calix[4]pyrrole host occurring at the organic/aqueous interface, which leads to a change of charge separation. The sensitivity and selectivity of the sensor studied depend on the acidity and lipophilicity of the phenolic analytes. The selected matrix effect on the potentiometric measurements has been checked.
ISSN: 0003-2719
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Food and Microbial Technology
Molecular Design and Synthesis
× corresponding author
# (joint) last author

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