Abstract
AbstractThe paper continues the investigation of the smectic C and A phases of the title compounds which has been done in Part I by DSC calorimetry. Here the layer spacings in the SC and SA phases are presented which exhibit a remarkable different temperature dependence in the SC phases within the homologous series. A tendency of a change from a second order SC/SA transition to a first order transition has been found. The layer spacings of the SA phase show a chain length dependent difference to the lengths of the molecules which may be explained by an increasing amount of gauche conformations in the higher homologues.
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