A Stable Hydroxide-Conducting Polymer

A Stable Hydroxide-Conducting Polymer

A stable hydroxide-conducting membrane based on benzimidazolium hydroxide and its analogous anion-exchange polymer is reported for the first time. The molecular and polymeric analogues possess unprecedented hydroxide stability in neutral and KOH solutions as the soluble benzimidazolium salt, made po...

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Veröffentlicht in:Journal of the American Chemical Society 2012-07, Vol.134 (26), p.10753-10756
Hauptverfasser: Thomas, Owen D., Soo, Kristen J. W. Y., Peckham, Timothy J., Kulkarni, Mahesh P., Holdcroft, Steven
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container_end_page 10756
container_issue 26
container_start_page 10753
container_title Journal of the American Chemical Society
container_volume 134
creator Thomas, Owen D.
Soo, Kristen J. W. Y.
Peckham, Timothy J.
Kulkarni, Mahesh P.
Holdcroft, Steven
description A stable hydroxide-conducting membrane based on benzimidazolium hydroxide and its analogous anion-exchange polymer is reported for the first time. The molecular and polymeric analogues possess unprecedented hydroxide stability in neutral and KOH solutions as the soluble benzimidazolium salt, made possible by steric crowding around the benzimidazolium C2 position, which is usually susceptible to nucleophilic attack by OH–. The polymers were cast and insolubilized for the purpose of forming membranes by blending with a poly(benzimidazole) followed by hydroxide-activated electrostatic interactions. The resulting membranes possess ionic (OH–) conductivities of up to 13.2 mS cm–1 and represent a new class of anion-exchange polymers and membranes.
doi_str_mv 10.1021/ja303067t
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title A Stable Hydroxide-Conducting Polymer
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