Abstract
AbstractA chiral ionic liquid (CIL) derived from the dipeptide glycine‐L‐histidine (Gly‐L‐His) cation and bis(trifluoroethyl)sulfonyl imide (NTF2) anion was prepared. The CIL was synthesized via ion‐exchange and evaluated for purity, melting points, thermal stability, and chiral recognition ability. The thermal decomposition temperature of [Gly‐L‐His][NTF2] CIL was 356 °C. The melting point of the CIL was ∼100 °C. The CIL was found to have a fluorescence emission peak with a λmax at 440 nm upon excitation at 364 nm. Fluorescence spectroscopy studies showed that the CIL exhibited chiral recognition ability for enantiomers of naproxen, propranolol, and 2,2,2‐trifluoroanthryl ethanol. The glycine‐L‐histidine bis(trifluoroethyl) sulfonyl imide IL effectively served as a solvent and chiral selector. The high thermal stability of this CIL indicates potential to be used as a solvent and chiral selector in high temperature reactions and as a stationary phase for gas chromatography.
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