N‑Methylquinuclidinium versus N,N‑Dimethylpiperidinium Cations on Flexible Side Chains in Anion Exchange Membranes.
| Title: | N‑Methylquinuclidinium versus N,N‑Dimethylpiperidinium Cations on Flexible Side Chains in Anion Exchange Membranes. |
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| Authors: | Chen S; Department of Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.; Luong TND; Department of Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.; Jannasch P; Department of Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden. |
| Source: | ACS materials Au [ACS Mater Au] 2025 Nov 03; Vol. 6 (1), pp. 112-118. Date of Electronic Publication: 2025 Nov 03 (Print Publication: 2026). |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: ACS Publications Country of Publication: United States NLM ID: 9918300688806676 Publication Model: eCollection Cited Medium: Internet ISSN: 2694-2461 (Electronic) Linking ISSN: 26942461 NLM ISO Abbreviation: ACS Mater Au Subsets: PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: Washington, DC : ACS Publications, [2021]- |
| Abstract: | The conductivity and stability of anion exchange membranes (AEMs) may be significantly enhanced by attaching the cations to the polymer backbones via flexible side chains. Here, we have tethered polydimethylfluorene with the bicyclic "cage-like" N-methylquinuclidinium (PdF-Qui) and the monocyclic N,N-dimethylpiperidinium (PdF-Pip) cations, respectively, via flexible side chains, and studied key AEM properties. Morphological investigations revealed efficient ion clustering in both AEMs, with OH- conductivities exceeding 120 mS cm-1 at 80 °C. Alkaline stability studies showed no ionic loss or structural changes in PdF-Qui after storage in a 5 M aqueous NaOH solution at 90 °C for 360 h. In contrast, the benchmark PdF-Pip suffered a 7% loss under the same conditions, primarily via Hofmann elimination. This work presents an efficient synthetic strategy to tether N-methylquinuclidinium cations to polymers for AEMs combining outstanding alkaline stability, efficient ionic clustering, and high OH- conductivity.; (© 2025 The Authors. Published by American Chemical Society.) |
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| Contributed Indexing: | Keywords: alkaline stability; fuel cells; ion conductivity; ion exchange membranes; quaternary ammonium; water electrolysis |
| Entry Date(s): | Date Created: 20260119 Date Completed: 20260119 Latest Revision: 20260121 |
| Update Code: | 20260130 |
| PubMed Central ID: | PMC12810033 |
| DOI: | 10.1021/acsmaterialsau.5c00168 |
| PMID: | 41550894 |
| Database: | MEDLINE |
Journal Article