Chiral Recognition in Molecular and Macromolecular Pairs of(S)- and (R)-1-Cyano-2-Methylpropyl 4'((4-(8-Vinyloxyoctyloxy)Benzoyl))Biphenyl-4-Carboxylate Enantiomers

摘要

In the field of liquid crystals chiral molecular recognition was observed invarious layered phases of enantiomeric pairs of low molar mass liquid crystals, although very little understanding of the influence of structural parameters on its manifestation is available. Molecular recognition in enantiomeric and diasteromeric pairs of macromolecular liquid crystals has not been studied, mainly because of the lack of the techniques available to synthesize enantiomeric and diastereomeric pairs of liquid crystalline polymers with well controlled molecular weight and narrow molecular weight distribution. Recently we initiated a systematic series of investigations on the chiral molecular recognition by studying the relationship between molecular, macromolecular and supramolecular structures and the extent of manifestation of heterochiral recognition. The methodology used in our research involves the synthesis of enantiomeric and diastereomeric mesogenic vinyl ethers and of the corresponding homopolymers and copolymers by living cationic polymerization and copolymerization reactions. Living cationic polymerization provides homogeneous polymers and copolymers with well controlled molecular weight, composition and narrow molecular weight distribution.