Liquid crystallinity in metal ion — dodecylbenzenesulfonate systems: x-ray diffraction characterization.

Phase behavior and liquid crystal structures of metal dodecylbenzenesulfonates have been investigated by x-ray diffraction and polarization microscopy. Interplanar distances in the lyotropic lamellae exhibited the differences (D/Å between 35 and 39). It can be assumed that the structures of the lamellar layers have been influenced by various possible reasons, i.e. the hydration of individual metal ions within the water layers of lamellae, the depression of water layers, and the depression of paraffin layers. The types of lamellar organization in the crystalline phases, crystallized from ether or from water solutions, remain in a smectic arrangement with the rigid structure of smaller interplanar distances than those in liquid crystal state. [ABSTRACT FROM AUTHOR]