Sulfobetaine ionic liquid crystals based on strong acids: phase behavior and electrochemistry

A group of new zwitterion based ionic liquid crystals (ILCs) have been synthesized. Depending on the counter anion (mesylate or hydrogen sulfate) the phase behavior of the resulting ILCs is quite different. Mesylate based ILCs show complex phase behavior with multiple phases depending on the alkyl c...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2025-01, Vol.27 (2), p.844-860
Main Authors: Lange, Alyna, Kapernaum, Nadia, Wojnarowska, Zaneta, Holtzheimer, Lea, Mies, Stefan, Williams, Vance, Gießelmann, Frank, Taubert, Andreas
Format: Article
Language:English
Subjects:
Electrochemistry
High temperature
Hydrogen
Ionic liquids
Liquid crystals
Thermal stability
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Summary:A group of new zwitterion based ionic liquid crystals (ILCs) have been synthesized. Depending on the counter anion (mesylate or hydrogen sulfate) the phase behavior of the resulting ILCs is quite different. Mesylate based ILCs show complex phase behavior with multiple phases depending on the alkyl chain length. In contrast, hydrogen sulfate based systems always exhibit Col phases irrespective of the alkyl chain length. The latter show much larger ILC mesophase windows and are thermally stable up to 200 °C. All ILCs show reasonable ionic conductivities of up to 10 S cm at elevated temperatures, making these ILCs candidates for intermediate temperature ionic conductors.
ISSN:1463-9076
1463-9084
1463-9084
DOI:10.1039/d4cp03060e