A simulation study of CS2 solutions in two related ionic liquids with dications and monocations

R. M. Lynden-Bell, E. L. Quitevis

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Atomistic simulations of solutions of CS2 in an ionic liquid, [C8(C1im)2][NTf2]2, with a divalent cation and in the corresponding ionic liquid with a monovalent cation, [C4C1im][NTf2], were carried out. The low-frequency librational density of states of the CS2 was of particular interest in view of recent optical heterodyne-detected Raman-induced Kerr effect spectroscopy (OHD-RIKES). Compared to the monocation ionic liquid, the maximum shifts to higher frequencies in the dication ionic liquid under ambient conditions, but was found to be significantly pressure-dependent. CS2 molecules lie above and below the plane of the imidazolium rings and found to be close to the butyl tails of the monocation. The diffusion rates and embedding energies of solvent ions and CS2 in the two ionic liquids were measured.

Original languageEnglish
Article number193844
JournalJournal of Chemical Physics
Issue number19
StatePublished - May 21 2018

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