Synthesis of Unsymmetrically 1,1'-Disubstituted Ferrocene Derivatives and Their Liquid Crystallinity (2)

Synthesis of Liquid Crystalline Ferrocene Derivatives Containing Two Different Mesogenic Groups and Their Phase Transition Behavior

Abstract

Unsymmetrically 1,1'-disubstituted ferrocene derivatives have two different substituents at 1 and 1' positions. The unsymmetrical derivatives were systematically prepared with changing the number of benzene ring in the mesogenic groups. In addition, symmetrically 1,1'-disubstituted ferrocene derivatives were prepared in order to compare the phase transition behavior of these compounds with those of the unsymmetrical derivatives. The phase transition behavior of objective compoumds was studied by a differential scanning caloriemetry measurement and a polarizing microscopy observation, and the relationship between the structure and the temperature range of liquid crystalline phase was discussed.