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Imidazolium Cations with Exceptional Alkaline Stability: A Systematic Study of Structure–Stability Relationships

Hugar, Kristina M ; Kostalik, Henry A ; Coates, Geoffrey W

Journal of the American Chemical Society, 2015-07, Vol.137 (27), p.8730-8737 [Periódico revisado por pares]

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Título:
Imidazolium Cations with Exceptional Alkaline Stability: A Systematic Study of Structure–Stability Relationships
Autor: Hugar, Kristina M ; Kostalik, Henry A ; Coates, Geoffrey W
Assuntos: INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
É parte de: Journal of the American Chemical Society, 2015-07, Vol.137 (27), p.8730-8737
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
SC0001086
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Descrição: Highly base-stable cationic moieties are a critical component of anion exchange membranes (AEMs) in alkaline fuel cells (AFCs); however, the commonly employed organic cations have limited alkaline stability. To address this problem, we synthesized and characterized the stability of a series of imidazolium cations in 1, 2, or 5 M KOH/CD3OH at 80 °C, systematically evaluating the impact of substitution on chemical stability. The substituent identity at each position of the imidazolium ring has a dramatic effect on the overall cation stability. We report imidazolium cations that have the highest alkaline stabilities reported to date, >99% cation remaining after 30 days in 5 M KOH/CD3OH at 80 °C.
Editor: United States: American Chemical Society
Idioma: Inglês

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