Refractive indices, densities, polarizabilities and molecular order in cholesteric liquid crystals
NC Shivaprakash, MMM Abdoh, Srinivasa… - … Crystals and Liquid …, 1982 - Taylor & Francis
Molecular Crystals and Liquid Crystals, 1982•Taylor & Francis
The temperature variation of refractive indices (no, ne), birefringence (Δ n), density (ρ) and
order parameter (S) of two cholesteric liquid crystals—cholesteryl benzoate and laurate are
reported in the smectic, cholesteric and isotropic phases. The order parameters have been
evaluated using Aver'yanov's relations. The S values determined are good agreement with
NMR data. The mean polarizabilities (α) of a few cholesteric liquid crystals have been
evaluated using (i) the modified method of Lippincott-δ-function potential model and (ii) the …
order parameter (S) of two cholesteric liquid crystals—cholesteryl benzoate and laurate are
reported in the smectic, cholesteric and isotropic phases. The order parameters have been
evaluated using Aver'yanov's relations. The S values determined are good agreement with
NMR data. The mean polarizabilities (α) of a few cholesteric liquid crystals have been
evaluated using (i) the modified method of Lippincott-δ-function potential model and (ii) the …
Abstract
The temperature variation of refractive indices (n o,ne), birefringence (Δn), density (ρ) and order parameter (S) of two cholesteric liquid crystals—cholesteryl benzoate and laurate are reported in the smectic, cholesteric and isotropic phases. The order parameters have been evaluated using Aver'yanov's relations. The S values determined are good agreement with NMR data.
The mean polarizabilities (α) of a few cholesteric liquid crystals have been evaluated using (i) the modified method of Lippincott-δ-function potential model and (ii) the additivity rule of bond polarizabilities. There is good agreement between the values of α calculated by these methods and experimental values, thereby suggesting the general applicability of Lippincott-δ-function potential model to liquid crystals.
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