CC BY-NC 4.0 UnportedKnorr, AnneStange, PeterFumino, KoichiWeinhold, FrankLudwig, Ralf2022-05-182022-05-182016https://oa.tib.eu/renate/handle/123456789/8990https://doi.org/10.34657/8028Infrared spectroscopy and density functional theory calculations provide strong evidence for the formation of clusters of like-charged ions in ionic liquids. With decreasing temperature, cooperative hydrogen bonding overcomes repulsive electrostatic interaction. The resulting cyclic tetramers nicely resemble well-known molecular clusters of alcohols.enghttps://creativecommons.org/licenses/by-nc/4.0/540DFT calculationsIR spectroscopyhydrogen bondingionic liquidslike-charge interactionArticle