Rearching on assembling chiral ionic liquids by measuring the solubilities

The self-assembly of anion chiral ionic liquids with carboxylate was designed by using the difference of ratios of the solubility the between inorganic and organic salts.The theoretical purities of anion chiral ionic liquid were calculated according to the ratio of the solubility of inorganic(sodium chloride,sodium bromide,potassium chloride,potassium bromide)and organic salts((R)-2-hydroxy-4-phenylbutyric acid sodium and(R)-2-hydroxy-4-phenylbutyric acid potassium)in organic solvents.It was found that the theoretical purities of anion chiral ionic liquids could reach 98%when the ratios were below 0.05.The test showed that(R)-2-hydroxy-4-phenylbutyric acid potassium and 1-benzyl-3-methylimidazolium bromide could give a chiral ionic liquid with high purity via anion-exchanging in methanol solvent at 25℃.The purity was 98.4%detected by ion-chromatography,which was in good agreement with theoretical calculation