Two monomers

D-(-)-dibenzyl tartrate and D-(-)-tartaric acid dibenzyl amide

were synthesized with D-(-)-tartaric acid and diisopropyl D-(-)-tartrate as the chiral starting materials. These two monomers were copolymerized

respectively

with terephthaloyl chloride and 1

4-phenylene diisocyanate to yield chiral selectors of polyester and polyurethane. A new biselector CSP was prepared by the simultaneous immobilization of the polyester and the polyurethane on 3-aminopropyl silica gel. For the sake of the comparison with the biselector CSP

two individual phases based on the polyester and the polyurethane were also prepared by the same manner. The monomers

polymers and corresponding CSPs were characterized by FTIR

elemental analysis and NMR. The enantioseparation ability of the CSPs was evaluated towards chiral analytes of different structures under normal and reversed phase modes. The chromatographic data demonstrated the CSPs possess good chiral recognition ability

and the biselector CSP exhibited better chiral recognition ability than the two individual phase CSPs. The reason for the improvement of enantioseparation ability of the biselector CSP might be that the two selectors worked in a coordinative way during chiral recognition.