The synthesis of water-processable self-doped polymers has been achieved by direct (hetero)arylation polymerization (DHAP) using water as a cosolvent. The introduction of a counterion covalently attached to the backbone of the polymers enhanced their solubility and the stability of the solutions. Those polymers have shown air-stable electrical conductivities up to 50 S cm −1 without the use of any post-treatment. The good water processability of these conducting polymers is promising for printed electronics in a wide range of applications.

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 1H 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.

Azulene-based conjugated polymers exhibit unique features that can be exploited in several applications, including energy storage, coatings, sensors and printed electronics. The position by which the azulene is linked to...