FTIR-ATR-spectroscopic analysis of Bis-Crown ether based PVC-membranes - III. In situ spectroscopic and electrochemical methods to study surface and bulk membrane processes

K. Tóth, E. Lindner, E. Pungor, E. Zippel, R. Kellner

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49 Citations (Scopus)

Abstract

To get more information on the phase boundary and bulk membrane processes, the short and long time behaviour of potassium selective solvent polymeric membranes was studied. In parallel with the measurement of the dynamic response of model membranes, in situ spectroscopic measurements applying the Attenuated Total Reflection (ATR) technique in the infrared region, were carried out in solutions containing anions of different lipophilicity (Cl- and SCN-). Thin membranes (thinner than the penetration depth of IR beam) coated on the germanium reflection element by the dipping technique show no time dependence of the SCN bands in contact with KSCN solution of different concentrations, while the diffusion process of species can be monitored in thick membranes as it was shown in a time resolved study. The extremely short response times of ionophore based solvent polymeric membranes (determined under appropriate experimental conditions in this work) imply that the fundamental potential determining step of the overall response of this type of electrodes is a phase boundary process. Thus the slow inner membrane diffusion process followed by IR spectroscopy on the molecular level may affect only the long-term membrane behaviour.

Original languageEnglish
Pages (from-to)448-453
Number of pages6
JournalFresenius' Zeitschrift für Analytische Chemie
Volume331
Issue number3-4
DOIs
Publication statusPublished - Jan 1988

Fingerprint

Crown Ethers
Spectroscopic analysis
Fourier Transform Infrared Spectroscopy
Polyvinyl Chloride
Membranes
Polymeric membranes
Phase boundaries
Germanium
Time and motion study
Ionophores
Contacts (fluid mechanics)
Anions
Dynamic response
Infrared spectroscopy
Potassium
Reaction Time
Infrared radiation
Spectrum Analysis
Electrodes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Clinical Biochemistry
  • Medicine(all)

Cite this

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title = "FTIR-ATR-spectroscopic analysis of Bis-Crown ether based PVC-membranes - III. In situ spectroscopic and electrochemical methods to study surface and bulk membrane processes",
abstract = "To get more information on the phase boundary and bulk membrane processes, the short and long time behaviour of potassium selective solvent polymeric membranes was studied. In parallel with the measurement of the dynamic response of model membranes, in situ spectroscopic measurements applying the Attenuated Total Reflection (ATR) technique in the infrared region, were carried out in solutions containing anions of different lipophilicity (Cl- and SCN-). Thin membranes (thinner than the penetration depth of IR beam) coated on the germanium reflection element by the dipping technique show no time dependence of the SCN bands in contact with KSCN solution of different concentrations, while the diffusion process of species can be monitored in thick membranes as it was shown in a time resolved study. The extremely short response times of ionophore based solvent polymeric membranes (determined under appropriate experimental conditions in this work) imply that the fundamental potential determining step of the overall response of this type of electrodes is a phase boundary process. Thus the slow inner membrane diffusion process followed by IR spectroscopy on the molecular level may affect only the long-term membrane behaviour.",
author = "K. T{\'o}th and E. Lindner and E. Pungor and E. Zippel and R. Kellner",
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AU - Tóth, K.

AU - Lindner, E.

AU - Pungor, E.

AU - Zippel, E.

AU - Kellner, R.

PY - 1988/1

Y1 - 1988/1

N2 - To get more information on the phase boundary and bulk membrane processes, the short and long time behaviour of potassium selective solvent polymeric membranes was studied. In parallel with the measurement of the dynamic response of model membranes, in situ spectroscopic measurements applying the Attenuated Total Reflection (ATR) technique in the infrared region, were carried out in solutions containing anions of different lipophilicity (Cl- and SCN-). Thin membranes (thinner than the penetration depth of IR beam) coated on the germanium reflection element by the dipping technique show no time dependence of the SCN bands in contact with KSCN solution of different concentrations, while the diffusion process of species can be monitored in thick membranes as it was shown in a time resolved study. The extremely short response times of ionophore based solvent polymeric membranes (determined under appropriate experimental conditions in this work) imply that the fundamental potential determining step of the overall response of this type of electrodes is a phase boundary process. Thus the slow inner membrane diffusion process followed by IR spectroscopy on the molecular level may affect only the long-term membrane behaviour.

AB - To get more information on the phase boundary and bulk membrane processes, the short and long time behaviour of potassium selective solvent polymeric membranes was studied. In parallel with the measurement of the dynamic response of model membranes, in situ spectroscopic measurements applying the Attenuated Total Reflection (ATR) technique in the infrared region, were carried out in solutions containing anions of different lipophilicity (Cl- and SCN-). Thin membranes (thinner than the penetration depth of IR beam) coated on the germanium reflection element by the dipping technique show no time dependence of the SCN bands in contact with KSCN solution of different concentrations, while the diffusion process of species can be monitored in thick membranes as it was shown in a time resolved study. The extremely short response times of ionophore based solvent polymeric membranes (determined under appropriate experimental conditions in this work) imply that the fundamental potential determining step of the overall response of this type of electrodes is a phase boundary process. Thus the slow inner membrane diffusion process followed by IR spectroscopy on the molecular level may affect only the long-term membrane behaviour.

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