Chiral discrimination in Langmuir and Langmuir-Blodgett film of axially chiral 1,1´-binaphthyl acid

The effects of axial chirality on the Langmuir film behavior at the air-water interface and the morphological features of Langmuir-Blodgett (LB) .lms of 1,10-binaphthyl acid have been investigated by using surface pressure-area (π-A) isotherm measurement, Brewster angle microscopy (BAM), and atomic force microscopy (AFM). It is found that the chiral discrimination between S-enantiomeric and racemic films can be observed on pure water subphase. In contrast to the flat LB film of S-enantiomer, the racemic LB film exhibits the coexistence of both monolayer and bilayer.