title: A novel EIS field effect structures coated with TESUD-PPy-PVC-dibromoaza[7]helicene matrix for potassium ions detection.
abstract: In this work, we describe the development of new Aza[7]helicene-containing PVC-based membranes for the K(+) ions quantification. Here, silicon nitride-based structures (Si-p/SiO2/Si3N4) were developed and the surface was activated, functionalized with an aldehyde-silane (11-(Triethoxysilyl)undecanal (TESUD)), functionalized with polypyrrole (PPy), and coated with the polyvinylchloride (PVC)-membrane containing the Aza[7]helicene as ionophore. All stages of functionalization process have been thoroughly studied by contact angle measurements (CAMs) and atomic force microscopy (AFM). The developed ion-selective electrode (ISE) was then applied using electrochemical impedance spectroscopy (EIS) for the detection of potassium ions. A linear range was observed between 1.0 × 10(-8) M to 1.0 × 10(-3) M and a detection limit of 1.0 × 10(-8) M was observed. The EIS results have showed a good sensitivity to potassium ion using this novel technique. The target helicene exhibited good solubility and excellent thermal stability with a high decomposition temperature (Td > 300 °C) and it indicates that helicene may be a promising material as ionophore for ion-selective electrodes (ISEs) elaboration.
authors.affiliation: Laboratoire des Interfaces et des Matériaux Avancés (LIMA), Faculté des Sciences de Monastir, Université de Monastir, Tunisia; Université de Lyon, Institut de Sciences Analytiques (ISA) - UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France. Electronic address: tounsi1981@live.fr.
authors.forename: Moncef
authors.initials: M
authors.lastname: Tounsi
authors.affiliation: Laboratoire de Synthèse Organique Asymétrique et Catalyse Homogène, Faculté des Sciences, Université de Monastir, Avenue de l'environnement, 5019, Monastir, Tunisia.
authors.forename: Mourad
authors.initials: M
authors.lastname: Ben Braiek
authors.affiliation: Laboratoire des Interfaces et des Matériaux Avancés (LIMA), Faculté des Sciences de Monastir, Université de Monastir, Tunisia.
authors.forename: Houcine
authors.initials: H
authors.lastname: Barhoumi
authors.affiliation: Université de Lyon, Institut de Sciences Analytiques (ISA) - UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France.
authors.forename: Abdoullatif
authors.initials: A
authors.lastname: Baraket
authors.affiliation: Université de Lyon, Institut de Sciences Analytiques (ISA) - UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France.
authors.forename: Michael
authors.initials: M
authors.lastname: Lee
authors.affiliation: Université de Lyon, Institut de Sciences Analytiques (ISA) - UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France.
authors.forename: Nadia
authors.initials: N
authors.lastname: Zine
authors.affiliation: Laboratoire des Interfaces et des Matériaux Avancés (LIMA), Faculté des Sciences de Monastir, Université de Monastir, Tunisia.
authors.forename: Abderrazak
authors.initials: A
authors.lastname: Maaref
authors.affiliation: Université de Lyon, Institut de Sciences Analytiques (ISA) - UMR 5280, 5 rue de la Doua, 69100 Villeurbanne, France. Electronic address: abdelhamid.errachid-el-salhi@univ-lyon1.fr.
authors.forename: Abdelhamid
authors.initials: A
authors.lastname: Errachid
mesh_terms: D058266:Dielectric Spectroscopy; D004566:Electrodes; D011083:Polycyclic Compounds / Q000737:chemistry*; D011188:Potassium / Q000032:analysis*; D012828:Silicones / Q000737:chemistry*
chemical_list: D011083:Polycyclic Compounds; D012828:Silicones; C031660:helicenes; D011188:Potassium
keywords: Aldehydic silane; Electrochemical impedance spectroscopy; Potassium sensitivity; Silicon nitride; [7]Helicene