Isomeric cationic ionenes as n-dopant agents of poly(3,4-ethylenedioxythiophene) for in situ gelation

Soft Matter
Maricruz G SaboríoCarlos Alemán

Abstract

Three isomeric ionene polymers containing 1,4-diazabicyclo[2.2.2]octane (DABCO) and N,N'-(x-phenylene)dibenzamide (x = ortho-/meta-/para-) linkages have been used as dopant agents to produce n-doped poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes by reducing already dedoped conducting polymer (CP) films. This work focuses on the influence of the ionene topology on both the properties of n-doped PEDOT:ionene electrodes and the success of the in situ thermal gelation of the ionene inside the CP matrix. The highest doping level is reached for the para-isomeric ionene-containing electrode, even though the content of ortho- and meta-topomers in the corresponding n-doped PEDOT:ionene electrodes is greater. Thus, many of the incorporated ionene units are not directly interacting with CP chains and, therefore, they do not play an active role as n-dopant agents but they are crucial for the in situ formation of the ionene hydrogels. The effect of the ionene topology is practically non-existent on properties such as the specific capacitance and wettability of PEDOT:ionene films, and it is small but non-negligible on the electrochemical and thermal stability. In contrast, the surface morphology, topography, and distribution of dopant m...Continue Reading

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Citations

Jan 4, 2021·Journal of Controlled Release : Official Journal of the Controlled Release Society·Anna Puiggalí-JouCarlos Alemán

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