Unusual polymorphism in new bent-shaped liquid crystals based on biphenyl as a central molecular core.

ABSTRACT: Bent-shaped mesogens possessing a biphenyl as a central core have been synthesized and the role of the terminal chain and the orientation of the ester as a linkage group have been investigated. For the studied molecular core we have established that both parameters play an important role for the mesomorphic properties. The polyfluoroalkyl terminal chain supports the formation of mesophases, and the introduction of a chiral lactate terminal chain destabilizes mesophases for the first type of mutual orientation of ester groups, attached to the central core. On the contrary, for the opposite orientation of esters, the terminal chain has no effect on the mesomorphic properties, and columnar phases have been found for all compounds. A unique phase sequence has been found for the mesogen with th

SUBMITTER: Kovarova A 

PROVIDER: S-EPMC3999814 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature