The orientational order and conformational distributions of the two enantiomers in a racemic mixture of a chiral,flexible molecule dissolved in a chiral nematic liquid crystalline solvent

摘要

The orientational order and conformational distributions of the two enantiomers of(+-)-alpha-ethylhexanoic acid-d_15,a flexible chiral molecule,dissolved in a chiral nematic liquid crystalline solvent made of PBLG in an organic co-solvent are obtained by analysis of NMR data.The anisotropic,NMR parameters are obtained from the separated analysis of the two enantiomers using carbon-deuterium,deuterium-deuterium 2D correlation experiments and proton-coupled carbon-13 ID experiments.The analysis of conformational distributions,and the conformationally dependent orientational order parameters are derived using the additive potential,AP,model.