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US 12,606,666 B2Granted
Imidazoles and imidazolium cations with exceptional alkaline stability
AssigneeCornell University
InventorsGeoffrey W. Coates, Kristina M. Hugar
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Abstract
The invention provides: imidazole and imidazolium compounds of formulas (I) and (II): polymers containing a plurality of imidazolium-containing repeating units of formula (III′): and membranes and devices comprising the polymers. Also provided are methods of making the inventive compounds and polymers.
Claims16
A compound of formula (I) or (II):
- wherein:
- R1 is selected from C2-C16 hydrocarbyl, wherein one carbon atom of the C2-C16 hydrocarbyl may optionally be replaced by O;
- R2 is a moiety of formula;
- wherein:
- represents the point of attachment to the imidazole or imidazolium ring;
- and
- R6a, R6b, and R6c are individually selected from C1-C3 alkyl;
- R3 is selected from C2-C16 hydrocarbyl;
- R4 and R5 are individually selected from C1-C16 hydrocarbyl, or, taken together, R4 and R5, together with the carbon atoms to which they attached, form a ring selected from benzene, cyclooctene and norbornene;
- and
- X− is a counterion.
8 more elements
Dependencies are inferred from the claim text.