Sodium‐Ion Selectivity Study of a Crown‐Ether‐Functionalized PEDOT Analog
Résumé
Abstract An electropolymerized ion‐selective poly‐3,4‐ethylenedioxythiophene (PEDOT) analog is presented in this Communication. Poly‐(2‐phenyl‐15crown‐5‐(3,4‐ethylene‐dioxythiophene)‐amine) (PEDOT‐Crown15) showed excellent electrochemical stability with a fast electron transfer ( ΔE p =50 mV). In comparison with unmodified PEDOT, a faster change from isolating to conducting state was observed. This is attributed to the formation of a well‐ordered internal polymer matrix, caused by the aniline‐Crown15 moiety. In situ electrochemical conductance measurements in the presence of different monovalent cations showed high affinity for Na + ions, as evidenced by the decrease in the conductance of the polymer in comparison with K + and Li + . This selectivity is attributed to a limitation of the charge hopping conductance.
Domaines
Chimie
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2020 Na+ ion selectivity study of a crown ether functionalized PEDOT.pdf (1.9 Mo)
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