ArticleProceedings of the National Academy of Sciences of the United States of America2025
Warm, water-depleted rocky exoplanets with surface ionic liquids: A proposed class for planetary habitability.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Ionic Liquid Biospheres.Life (Basel, Switzerland) · 2026Article
- Warm, water-depleted rocky exoplanets with surface ionic liquids: A proposed class for planetary habitability.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
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9 authors.
Funding
Abstract
The discovery of thousands of exoplanets and the emergence of telescopes capable of exoplanet atmospheric characterization have intensified the search for habitable worlds. Due to selection biases, many exoplanets under study are planets deemed inhospitable because their surfaces are too warm to support liquid water. We propose that such planets could still support life through ionic liquids: Liquid salts with negligible vapor pressure that can persist on warm planets with thin atmospheres, where liquid water cannot. Ionic liquids have not previously been considered as naturally occurring substances, and thus have not been discussed in planetary science. We demonstrate in laboratory experiments that ionic liquids can form from planetary materials: Sulfuric acid combined with nitrogen-containing organic molecules. Sulfuric acid can be volcanic in origin, and organic compounds are commonly found on planetary bodies. The required planetary surface is water-depleted and must support sulfuric acid transiently in liquid phase to dissolve organics, followed by evaporation of excess liquid-conditions spanning approximately 300 K at 10
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