After cellulose was dissolved in a mixture of N,N-dimethylacetamide-LiCl-pyridine mixed solution,it was directly coated onto γ-aminopropyl silica gel,then immobilized onto silica gel using 4,4′-diphenylmethane diisocyanate and hexamethylene diisocyanate as the spacer,respectively,and finally reacted with an excess of 3,5-dimethylphenyl isocyanate.Thus,two immobilized-type chiral stationary phases(CSPs) based on cellulose 3,5-dimethylphenylcarbamate were prepared and evaluated for HPLC enantioseparation.The results showed that the obtained CSPs exhibited high chiral recognition ability and solvent durability.Many of the tested racemates could be well resolved when using eluents containing chloroform or tetrahydrofuran instead of the conventional eluent(e.g.hexane-isopropanol mixture).In addition,interfences on the chiral recognition of CSPs due to different diisocyanates could be negligible.
Development Progress of Immobilized Chiral Stationary Phases Based on Polysaccharide Derivatives
Preparation of a Covalent Organic Framework TpBD-(NH2)2-D-(-)-α-phenylglycine and Its Application Used as Chiral Stationary Phase for High Performance Liquid Chromatography
Chiral Separation of Clenbuterol Stereoisomer by Ultrahigh Performance Convergence Chromatography and Its Application in Residue Determination of Swine Urine
Research on Separation and Determination of Carnitine Enantiomers in Health Foods Based on Ultra-performance Convergence Chromatography
Scientific PapersSeparation of Chiral Compounds Using Chiral Covalent Organic Frameworks CTpPa-1 as HPLC Stationary Phase
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