Determination of Kamlet-Taft parameters for selected solvate ionic liquids.
The normalised polarity E and Kamlet-Taft parameters of recently described solvate ionic liquids, composed of lithium bis(trifluoromethyl)sulfonimide (LiTFSI) in tri- () or tetraglyme () have been determined and compared to the parent glyme ( and ). We show that these solvate ionic liquids have a high polarity (, (E) = 1.03; , (E) = 1.03) and display very high electron pair accepting characteristics (, α = 1.32; , α = 1.35). Molecular dynamics simulations suggest that the chelated lithium cation is responsible for this observation. The relatively small hydrogen bond acceptor (β) values for these systems (, β = 0.41; , β = 0.37) are thought to be due primarily to the TFSI anion, which is supplemented slightly by the glyme oxygen atom. In addition, these solvate ionic liquids are found to have a high polarisability (, π* = 0.94; , π* = 0.90).
Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, Victoria 3216, Australia. luke.henderson@deakin.edu.au and Strategic Research Centre for Chemistry and Biotechnology, Deakin University, Waurn Ponds Campus, Geelong, Victoria 3216, Australia.
Daniel J
DJ
Eyckens
Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, Victoria 3216, Australia. luke.henderson@deakin.edu.au.
Baris
B
Demir
Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, Victoria 3216, Australia. luke.henderson@deakin.edu.au.
Tiffany R
TR
Walsh
Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
Tom
T
Welton
Institute for Frontier Materials, Deakin University, Waurn Ponds Campus, Geelong, Victoria 3216, Australia. luke.henderson@deakin.edu.au and Strategic Research Centre for Chemistry and Biotechnology, Deakin University, Waurn Ponds Campus, Geelong, Victoria 3216, Australia.
Luke C
LC
Henderson