Journal
CHEMICAL COMMUNICATIONS
Volume 47, Issue 47, Pages 12676-12678Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cc14817f
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Funding
- MEXT of Japan [452/17073009]
- NEDO
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The temperature dependence of the N-H proton chemical shift in protic ionic liquids (PILs) and FT-IR spectra of the N-H bonds indicated the presence of strong hydrogen bonds between the protonated cation and the anion, depending on the Delta pK(a) of the constituent acid and base, and their successive breaking with temperature, which may explain the characteristic properties of PILs such as relatively low ionicity and its decrease with temperature.
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