Comparative Dielectric Investigation on Two Newly Synthesized H-Shaped Mesogenic Dimers

摘要

The present study reports comparative dielectric study of two newly synthesized unusual H shaped mesogenic dimers. We have performed dielectric study with temperature variation in the frequency range 100 Hz to 40 MHz. The present study is important due to unusual shape of these liquid crystal dimers. The dielectric results suggest that relaxation mode has been observed in MHz region for Sample 1 while no relaxation mode has been observed for Sample 2 due to the shifting in higher side . For Sample 1 relaxation mode follows Cole-Cole theory and relaxation frequency and relaxation strength have been evaluated from Cole-Cole plot. In addition to this, activation energy has also been calculated from Arrhenius plot showing higher value than other conventional liquid crystal material.