Solvation structure and dynamics of Li+ in Lewis-basic ionic liquid of 1-octy1-4-aza-l-azoniabicyclo[2.2.2]octane bis(trifluoromethanesulfonyl)amide

H-1, C-13, L, N-15, and F-19 NMR spectra of 1-octy1-4-aza-1-azoniabicyclo[2.2.2]octane bis(trifluoromethanesulfonyl) amide ([C(8)dabco][TFSA]) solutions with and without LiTFSA (lithium mole fractions of x(Li); = 0 and 0.1) were measured at 3132 K. The chemical shift measured for each nucleus was corrected for volume magnetic susceptibility of the solution. For comparison, those NMR spectra of 1-methyl-3-octylimidazolium bis(trifluoromethanesulfonyl) amide ([C(8)mim][TFSAD solutions were recorded under the same condition. The peak shifts for the nuclei induced by the dissolution of Li+ showed that Li+ interacts with not only TFSA(-) but also Caciabco+ in [C(8)dabco][TFSA] solution. Self-diffusion coefficients of the cation, anion, and Li+ in the ionic liquid solutions were determined by a pulsed field gradient NMR technique. Correlation times for jump motion of Li+ were estimated from Li-7 longitudinal relaxation times with two different magnetic fields. The diffusion and jump motions of Li+ in [C(8)dabco][TFSA] and IConim][TFSA] solutions are discussed in terms of interionic interactions. (C) 2015 Elsevier B.V. All rights reserved.