DIACETYLENIC LIQUID CRYSTALS: A SYSTEMATIC INVESTIGATION OF THE HOMOLOGOUS SERIES OF 4,4'-DIALKANOYLOXYDIPHENYLDIACETYLENES
The homologous series of 4,4'-dialkanoyloxydiphenyldiacetylenes with n ranging from zero to ten have been prepared.Optical microscopy, differential scanning calorimetry and X-ray diffraction have been used to study the mesomorphic behavior of these compounds.All homologs with n=1-7 are liquid crystals having nematic phases.In addition to nematic phases, these esters have extensive solid-state polymorphism.The transition enthalpies and entropies have also been calculated.
Ozcayir, Y.,Asrar, J.,Blumstein, A.
p. 263 - 276
(2007/10/02)
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