Study of Binary Cholesteric Liquid Crystalline Mixtures Doped with Some Chiral Nonmesogenic Estradiol Derivatives

We investigated the influence of some estradiol derivatives on the thermal and structural properties of binary mixtures of cholesteryl enantate and cholesteryl myristate. The characterization of the mesophases was made by polarizing optical microscopy, differential scanning calorimetry and X-ray dif...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2011-09, Vol.547 (1), p.1736
Main Authors: Obadovic, D Z, Stojanovic, M, Jovanovic-Santa, S, Cvetinov, M, Lazar, D, Vajda, A, Éber, N, Ristic, I
Format: Article
Language:English
Subjects:
Differential scanning calorimetry
Diffraction
Liquid crystal polymers
Molecular structure
Molecules
Online Access:Get full text
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Summary:We investigated the influence of some estradiol derivatives on the thermal and structural properties of binary mixtures of cholesteryl enantate and cholesteryl myristate. The characterization of the mesophases was made by polarizing optical microscopy, differential scanning calorimetry and X-ray diffraction. A considerable shift of the phase transition temperature I...Ch, as well as the temperature of formation of the SmA* phase was observed. Besides phase sequences and phase transition temperatures the measurements enabled the determination of some molecular parameters of the mixtures: the thickness of smectic layers and the longitudinal spacing distance in the cholesteric phase (d) and the average distance between the long axes of neighboring molecules (D). (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:1542-1406
1527-1943