Induced Rotary Power in Ternary Mixtures of Liquid Crystals
We have observed that a ternary mixture comprising one nematic component and a compensated binary cholesteric results in an inversion wavelength (λo) in the near infrared for a broad range of nematic ratios. In particular, the system consisting of N — (p — methoxybenzylidene) — p — butylaniline, cholesteryl nonanoate and cholesteryl chloride was studied over a wide compositional region. Measured pitch values indicate a large deviation from the linear additive law. An interpretation lies in the possibility that both cholesteric species interact with the nematic, but with different strengths. Consequently, the nematic exhibits some net rotary power. A determination of coupling constants will be presented.
KeywordsFraction Mixture Ternary Mixture Rotary Power Rich Mixture Simple Functional Form
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