Anion and cation dynamics of sulfonylamide-based ionic liquids and the solid-liquid transitions

Physical Chemistry Chemical Physics : PCCP
Mamoru ImanariKeiko Nishikawa

Abstract

Some of the important factors that characterise room-temperature ionic liquids (RTILs) are the variety of conformations adopted by the constituent ions and their flexibility. Using 1,3-dimethylimidazolium bis(fluorosulfonyl)amide ([C1mim][FSA]) and 1,3-dimethylimidazolium bis(trifluoromethylsulfonyl)amide ([C1mim][NTf2]) as samples, the longitudinal and transverse relaxation times (T1 and T2) for (19)F and (1)H were determined as a function of temperature and were correlated with the dynamics of the phase behaviours of the two RTILs. Because the anions and cations in the two compounds have (19)F and (1)H nuclei, respectively, their dynamics can be independently investigated and the relationships between them can be discussed. For [C1mim][FSA], the only observed phase changes included melting and crystallisation. The temperature dependences of T1 and T2 for (19)F were similar to those of T1 and T2 for (1)H, indicating similar dynamics due to the formation of strong anion-cation interactions. For [C1mim][NTf2], the T1 and T2 values for both (19)F and (1)H discontinuously changed at same temperatures, which were assigned to the crystallisation and melting points. However, the T1 curves for (19)F and (1)H were different in the crys...Continue Reading

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Mar 14, 2012·The Journal of Physical Chemistry. B·Mamoru ImanariKeiko Nishikawa

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Citations

Sep 1, 2015·The Journal of Physical Chemistry. B·Yuichi ShimizuKeiko Nishikawa
Jun 27, 2015·Journal of the American Chemical Society·Ali M Abdel-MageedR Jürgen Behm
Sep 19, 2017·Magnetic Resonance in Chemistry : MRC·R Nanda, Krishnan Damodaran
Mar 19, 2020·The Journal of Physical Chemistry. B·Maria Enrica Di PietroAndrea Mele

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