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Title: Interface host-guest interaction between calix[4]pyrrole and neutral derivatives of phenol as the base for their potentiometric discrimination
Authors: Radecki, J ×
Radecka, H
Piotrowski, T
Depraetere, S
Dehaen, Wim
Plavec, J #
Issue Date: Jan-2004
Publisher: Wiley-v c h verlag gmbh
Series Title: Electroanalysis vol:16 issue:24 pages:2073-2081
Abstract: Calix[4]pyrrole liquid membrane electrodes display a potentiometric response towards the neutral form of phenol derivatives. They do not respond towards the corresponding anionic forms. The mechanism of the generation of the potentiometric signal relies on: (1) The creation of supramolecular complex calix[4]pyrrole-nitrophenol at the organic/aqueous interface; (2) The increasing of the acidity of OH group from nitrophenol molecules due to formation of hydrogen bond between calix[4]pyrrole-nitrophenol at the interface; (3) The dissociation of the OH group from calix[4]pyrrole-nitrophenol complex and the ejection of H+ to the aqueous layer adjusted to the membrane organic phase boundary. The sensitivity and selectivity of the calix[4]pyrrole liquid membrane electrodes are governed by the lipophilicity and acidity of the phenolic guests. Also, the affinity to create a hydrogen bond between the host and the target molecule is a parameter which has a strong influence on the phenomena studied.
ISSN: 1040-0397
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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