PB17 Synthesis and polymorphisum of polycatenal mesogens with a perfluorinated substituent : Isotropic - smectic A second order phase transition

Abstract

A polycatenal compound having a bulky perfluorinated substituent and three long alkyl chains was synthesized and phase behavior was investigated. Due to the high incompatibility between the perfluorinated substituent and the hydrocarbon moiety, liquid crystalline structures with nano-segregation are expected to form. Remarkably we have found the material showing second order isotropic - smectic A phase transition, which was determined with DSC measuring a faint amount of enthalpy change and XRD observing continuous changes of physical properties.