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Artículo

Reversible modulation of the redox activity in conducting polymer nanofilms induced by hydrophobic collapse of a surface-grafted polyelectrolyte

Fenoy, Gonzalo EduardoIcon ; Giussi, Juan MartínIcon ; Von Bilderling, CatalinaIcon ; Maza, Eliana MaríaIcon ; Pietrasanta, LiaIcon ; Knoll, Wolfgang; Marmisollé, Waldemar AlejandroIcon ; Azzaroni, OmarIcon
Fecha de publicación: 05/2018
Editorial: Academic Press Inc Elsevier Science
Revista: Journal of Colloid and Interface Science
ISSN: 0021-9797
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Físico-Química, Ciencia de los Polímeros, Electroquímica

Resumen

We present the covalent modification of a Pani-like conducting polymer (polyaminobenzylamine, PABA) by grafting of a polyelectrolyte brush (poly [2-(methacryloyloxy)-ethyl-trimethylammonium chloride], PMETAC). As PABA has extra pendant amino moieties, the grafting procedure does not affect the backbone nitrogen atoms that are implicated in the electronic structure of the conducting polymers. Moreover, perchlorate anions interact very strongly with the quaternary ammonium pendant groups of PMETAC through ion pairing. Therefore, the grafting does not only keep the electroactivity of PABA in aqueous solutions but it adds the ion-actuation properties of the PMETAC brush to the modified electrode as demonstrated by contact angle measurements and electrochemical methods. In this way, the conjugation of the electron transfer properties of the conducting polymer with the anion responsiveness of the integrated brush renders perchlorate actuation of the electrochemical response. These results constitute a rational integration of nanometer-sized polymer building blocks that yields synergism of functionalities and illustrate the potentialities of nanoarchitectonics for pushing the limits of soft material science into the nanoworld.
Palabras clave: ANION RESPONSIVENESS , CONDUCTING POLYMERS , NANOARCHITECTONICS , POLYANILINE , POLYMER BRUSHES
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/88629
URL: https://www.sciencedirect.com/science/article/pii/S0021979718301504
URL: https://doi.org/10.1016/j.jcis.2018.02.014
Colecciones
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Citación
Fenoy, Gonzalo Eduardo; Giussi, Juan Martín; Von Bilderling, Catalina; Maza, Eliana María; Pietrasanta, Lia; et al.; Reversible modulation of the redox activity in conducting polymer nanofilms induced by hydrophobic collapse of a surface-grafted polyelectrolyte; Academic Press Inc Elsevier Science; Journal of Colloid and Interface Science; 518; 5-2018; 92-101
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