Solution-Printable PEDOT Solid-Contact for Nitrate-Selective Electrodes: Enhanced Selectivity from Anion Dopant Exchange.

Poly(3,4-ethylenedioxythiophene)-polyethylene glycol (PEDOT:PEG) is a conductive material adopted in bioelectronics due to its biocompatibility and stability. While PEDOT has established its utility in cationic solid-contact ion-selective electrodes (sc-ISEs), its anionic counterpart remains less explored. Herein, we report the first example of PEDOT:PEG as a solution-printable solid-contact for all-solid-state nitrate-selective electrodes and a simple ion exchange treatment which can significantly enhance nitrate selectivity.

Halogen Bonding Ionophore for Potentiometric Iodide Sensing.

Iodide (I) is an essential micronutrient for thyroid function. Hence, rapid and portable sensing is important for I quantification in food and biological samples. Herein, we report the first example of a halogen bonding (XB) tripodal ionophore () which is selective for the I anion.