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Aromatic polymers incorporating bis-N-spirocyclic quaternary ammonium moieties for anion-exchange membranes

In English

Författare

Summary, in English

We have prepared and studied a new class of anion conducting membrane materials functionalized with N-spirocyclic quaternary ammonium (QA) cations formed via cyclo-quaternization reactions involving pyrrolidine, piperidine and azepane, respectively. These groups were introduced in pairs, adjoined through fused phenyl rings along poly(arylene ether sulfone) backbones. Despite their bulkiness, the bis-N-spirocyclic QA moieties efficiently formed ionic clusters in anion-exchange membranes (AEMs) and showed thermal stability up to 309 oC. The bis-N-spirocyclic QA moieties had reasonable alkaline stability and the hydroxide ion conductivity of the AEMs increased with decreasing ring size, and a fully hydrated pyrrolidine-based AEM reached a conductivity of 110 mS cm-1 at 80 oC. The results of this study indicate synthetic pathways to high-performance AEMs based on N-spirocyclic QA groups.

Publiceringsår

2015

Språk

Engelska

Sidor

1370-1375

Publikation/Tidskrift/Serie

ACS Macro Letters

Volym

4

Issue

12

Dokumenttyp

Artikel i tidskrift

Förlag

The American Chemical Society (ACS)

Ämne

  • Chemical Sciences
  • Polymer Technologies

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 2161-1653