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Potentiometric Response of Calix[4]pyrrole Liquid Membrane Electrode Towards Neutral Nitrophenols
Author(s) -
Piotrowski Tomasz,
Radecka Hanna,
Radecki Jerzy,
Depraetere Stefaan,
Dehaen Wim
Publication year - 2001
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200103)13:4<342::aid-elan342>3.0.co;2-i
Subject(s) - potentiometric titration , membrane , chemistry , protonation , nitrophenol , selectivity , pyrrole , calixarene , potentiometric sensor , electrode , inorganic chemistry , organic chemistry , molecule , ion , biochemistry , catalysis
Calix[4]pyrroles were applied as a new class of ligands of potentiometric sensors for neutral nitrophenol isomers. Calix[4]pyrrole‐containing liquid membranes exhibit a very high affinity to proton uptake. These membranes, in protonated form, showed very high selectivity towards para ‐nitrophenol in the presence of other nitrophenols and dihydroxybenzene isomers. The probable mechanism of the potentiometric signal generation of the membrane investigated upon stimulation by nitrophenol isomers existing in neutral form is discussed.