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J Am Chem Soc. 2012 Jul 4;134(26):10753-6. doi: 10.1021/ja303067t. Epub 2012 Jun 20.

A stable hydroxide-conducting polymer.

Author information

1
Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6.

Abstract

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.

PMID:
22712732
DOI:
10.1021/ja303067t

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