Chiral nematic state

The chiral nematic state, first observed in cholesteryl derivatives, was later detected in other chiral mesogens, and can also he induced hy adding small chiral molecules to a host nematic TCP. Chiral nematic LCPs have thus heen synthesized as side-chain polymers hy introducing a chiral unit in the tail moiety of mesogens or hy copolymerizing cholesterol-containing monomers with another potential mesogenic monomer. Examples [4] of these types are shown as structures (V) and (VI) ... 

A statistical model was introduced by Ki-mura et al. [25] which included attractive and repulsive asymmetric intermolecular forces for rod-like molecules. The results are summarized as Eq. (5), which is widely used for the lyotropic chiral nematic state... 

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