| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Malinowska, Elżbieta
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2020Promising electrodeposited biocompatible coatings for steel obtained from polymerized microemulsionscitations
- 2019Directly-thiolated graphene based electrochemical sensor for Hg(II) ioncitations
- 2017Graphene Nanoplatelets for Screen-Printed Nonenzymatic Voltammetric H2O2 Sensorscitations
- 2015Electrochemical oligonucleotide-based biosensor for the determination of lead ioncitations
- 2013Development of silicon-based electrochemical transducerscitations
- 2013Oligonucleotide-Based Electrochemical Biosensor for Hg2+ Using Methylene Blue as a Redox Indicatorcitations
- 2009Influence of inner transducer properties on EMF response and stability of solid-contact anion-selective membrane electrodes based on metalloporphyrin ionophorescitations
- 2009New polyacrylate-based lead(II) ion-selective electrodescitations
- 2007Further studies on the role of redox-active monolayer as intermediate phase of solid-state sensorscitations
- 2006CMP(O) tripodands: Synthesis, potentiometric studies and extractionscitations
- 2005Studies on ferrocene organothiol monolayer as an intermediate phase of potentiometric sensors with gold inner contactcitations
- 2004Design of ferrocene organothiol monolayer as intermediate phase for miniaturized electrochemical sensors with gold contact
- 2004Towards advanced chemical microsensors—an overviewcitations
- 2004Polymeric membrane electrodes with enhanced fluoride selectivity using Zr(IV)-porphyrins functioning as neutral carrierscitations
Places of action
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article
Polymeric membrane electrodes with enhanced fluoride selectivity using Zr(IV)-porphyrins functioning as neutral carriers
Abstract
Poly(vinyl chloride) polymeric membranes plasticized with o-NPOE (o-nitrophenyl octyl ether) or DOS (dibutyl sebacate) and containing Zr(IV)-octaethyl(OEP)- or Zr(IV)-tetraphenylporphyrins (TPP) along with lipophilic cationic additives (tridodecylmethylammonium chloride; TDMACl) are examined potentiometrically and optically with respect to their response toward fluoride. It is shown that these zirconium porphyrins can function as neutral anion carriers within the organic membranes of the electrodes. Spectrophotometric measurements of thin polymeric films indicate that the presence of lipophilic cationic sites in the form of TDMA+ and use of lower dielectric constant plasticizer (DOS) prevents formation of metalloporphyrin dimers in the organic polymer phase, which have been observed previously in polymeric membranes formulated with the same Zr(IV) porphyrins but with lipophilic anion site additives. By preventing dimer formation, rapid and Nernstian potentiometric response of the corresponding membrane electrodes toward fluoride ion is observed. Indeed, electrodes prepared with PVC/DOS membranes containing Zr(IV)-OEP and 15 mol\% of TDMACl (relative to the ionophore) exhibit fast (t95\<15 s) and reversible response toward fluoride. The slope of calibration plots are near-Nernstian (−59.9 mV per decade). Such electrodes display the following selectivity pattern: ClO4−\>SCN−\>F−\>NO3−\>Br−\>Cl−, which differs significantly from the classical Hofmeister series, with greatly enhanced potentiometric selectivity toward fluoride. The data presented herein, coupled with results from a previous study, confirm that Zr(IV) porphyrins can serve as either charged or neutral type anion carriers with respect to their enhanced interactions with fluoride when used as ionophores to prepare liquid–polymeric membrane electrodes, and that the nature of membrane additives and plasticizer dictates the response mechanism at play for given membrane formulations.