Abstract
Two series of cholesteryl derivatives comprising esterimide group with oxyethylene or methylene chains were synthesized. Additionally, some monomeric and dimeric compounds in which the esterimide groups were substituted by succinate ones have been prepared. Liquid crystalline properties of all compounds have been studied by means of DSC, polarized optical microscopy and x-ray diffraction methods. It was found that all esterimides with oxyethylene tails form the chiral nematic N<SUP>*</SUP> phase and bilayer smectic C<SUB>2</SUB>* phase. Theirs hydrocarbon chain analogues with the number of carbon atoms in the chain n > 2, form the N* phase and monolayer SA) phase. The esterimides with very short tails are monotropic and tend to form bilayer smectic A and C phases. Substitution of esterimide group by less polar succinate group leads to reduction of mesomorphic tendencies of dimeric and monomeric compounds.
Published Version
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