Electrochemical characterization of PVC-Pt(II) porphyrin-membrane

Plesu, Nicoleta and Fagadar-Cosma, Gheorghe and Lascu, Anca and Petric, Mihaela and Crisan, Manuela and Fagadar-Cosma, Eugenia: Electrochemical characterization of PVC-Pt(II) porphyrin-membrane. In: Proceedings of the International Symposium on Analytical and Environmental Problems, (24). pp. 188-192. (2018)

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The maximum water volume fraction absorbed by membrane based on Pt(II)- 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) in poly(vinyl)chloride (PVC) matrix applied on iron substrate is 0.3 % and the permeability is 7.6×10−12 m 2 s −1 . After 24 h immersion in the 0.5 M 4-morpholinoethanesulfonic acid (MES) solution of pH = 5.5, the Nyquist representation of impedance data shows diffusion into the membrane of electrolytes from the buffer solution, causing a decrease of the membrane electric resistance, but no delamination was observed for immersion longer than 48 h. Furthermore, the coating resistance is still close to ~16000 ohm.cm−2 after 25 hours. This recommends this membrane as good material in potentiometric sensors design.

Item Type: Article
Journal or Publication Title: Proceedings of the International Symposium on Analytical and Environmental Problems
Date: 2018
Volume: 24
ISBN: 978-963-306-623-2
Page Range: pp. 188-192
Uncontrolled Keywords: Elektrokémia
Additional Information: Bibliogr.: 192. p. ; összefoglalás angol nyelven
Date Deposited: 2019. Jan. 07. 08:52
Last Modified: 2019. Jan. 07. 08:52
URI: http://acta.bibl.u-szeged.hu/id/eprint/56319

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