Syntheses and Physical Properties of Liquid Crystals Containing Ferrocene(XIII) : Phase Transition of Monosubstituted and Disubstituted Ferrocene Derivatives

Abstract

The two homologous series of monosubstituted (APF-n)(n is the number of carbon atoms in the alkyl group) and disubstituted ferrocene derivatives (bAPF-n), which are shown in Fig.1, have been prepared and the phase transition of these compounds have been studied by the differential scanning calorimeter (DSC) and the polarizing microscope. In this study, APF-n and bAPF-n were compared from view points of an appearance of the phase transition. All of the APF-n have exhibited no liquid crystal phase. The APF-n (n=4,6,8,9) just have exhibited crystal-crystal phase transitions. On the other hand, all disubstituted ferrocene derivatives have shown the liquid crystal phase. These liquid crystal phases are considered a smectic phase.