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. 2020 Jun;41(12):e2000134.
doi: 10.1002/marc.202000134. Epub 2020 May 5.

Design of Potassium-Selective Mixed Ion/Electron Conducting Polymers

Ariana Villarroel Marquez  1   2 , Gerardo Salinas  3 , Myriam Abarkan  2 , Maël Idir  1 , Cyril Brochon  1 , Georges Hadziioannou  1 , Matthieu Raoux  2 , Alexander Kuhn  3 , Jochen Lang  2 , Eric Cloutet  1
Affiliations

Design of Potassium-Selective Mixed Ion/Electron Conducting Polymers

Ariana Villarroel Marquez et al. Macromol Rapid Commun. 2020 Jun.

Abstract

An approach providing cation-selective poly-(3,4-ethylenedioxythiophene)(PEDOT):polyelectrolyte-mixed conductors is presented in this communication based on the structural modification of this ambivalent (ionic and electronic conductive) polymer complex. First, an 18-crown-6 moiety is integrated into the styrene sulfonate monomer structure as a specific metal cation scavenger particularly targeting K+ versus Na+ detection. This newly functionalized monomer is characterized by 1 H NMR titration to evaluate the ion selectivity. Aqueous PEDOT dispersion inks containing the polymeric ion-selective moieties are designed and their electrical and electrochemical properties analyzed. These biocompatible inks are the first proof-of-concept step towards ion selectivity in view of their interfacing with biological cells and microorgans of interest in the field of biosensors and physiology.

Keywords: PEDOT; conducting polymers; coulovoltammetry; crown ethers; ion sensing.

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