Abstract
The dynamic and static properties of mixtures of 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]) and alcohols with various alkyl chain lengths were investigated. For alcohol concentrations of 20 mol% or less, where the alcohol/ionic liquid system maintains a nano-heterogeneous structure, the self-diffusion coefficient and the chemical shift of anions and cations in the alcohol/[BMIM][BF4] system were not dependent on the alkyl chain length of the alcohol, but were almost coincident with each other when comparing the same solvent concentration. This indicates that the solution structure of pure [BMIM][BF4] was almost maintained in the alcohol/ionic liquid system. Moreover, alcohol having short alkyl chain length and water moved clearly faster than the IL, but the movement of alcohol having long alkyl chain length moved close to that of the IL suggesting that the alcohols may not be able to move significantly in the IL.
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