Liquid-crystalline polymorphism of 4-alkyloxybenzylidene-4′-alkyloxyanilines and nonlinearity of their phase diagrams with different standards

This article presents the summary of our investigations of liquid-crystalline polymorphism of asymmetrical 4-alkyloxybenzylidene-4′-alkyloxyanilines. The existing type of mesophases was confirmed by Sackmann–Demus miscibility method. In this paper the influence of the polarity and the structure of the mesophases standards on the topology of phase diagrams are broadly discussed. Additionally we present X-ray investigations of two derivatives.