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- Title
Surface-Active Ionic Liquids in Catalytic Water Splitting.
- Authors
Cognigni, Alice; Palvögyi, Ádám Márk; Schröder, Christian; Peterlik, Herwig; Müllner, Alexander R. M.; Zirbs, Ronald; Weil, Matthias; Bica, Katharina
- Abstract
We report the application of surface-active ionic liquids as ligands and optional reaction media in iridium-catalyzed water oxidations. Three novel catalysts with N , N -dialkylimidazolidin-2-ylidene ligands based on amphiphilic imidazolium ionic liquids were synthesized and characterized. Excellent turn-over frequencies of up to 0.92 s−1 were obtained in catalytic water splitting, and activity was maintained for five consecutive catalytic cycles, with an overall turn-over number of 8967. The addition of external surface-active ionic liquid showed unexpected behaviour, because strongly enhanced initial reaction rates were observed. We present the application of imidazolium-based surface-active ionic liquids as ligands and optional reaction media in iridium-catalyzed water oxidations and report a strong influence of ionic liquid concentration in water on the catalytic performance.
- Subjects
IONIC liquids; IRIDIUM; IMIDAZOLES
- Publication
Australian Journal of Chemistry, 2019, Vol 72, Issue 2, p34
- ISSN
0004-9425
- Publication type
Article
- DOI
10.1071/CH18104