Table 1 and Figure 1shows the phase transition behaviour of S-Bi6 at different mail% in the mixed system. At 0 mole% of S-Bi6 (only 5CB), clearing point was found at around 35 °C. In the mixed system of 5CB/S-Bi6, it was found that temperature range of chiral nematic phase becomes widened, the gold complex with biphenyl ring was stabilized in chiral nematic phase and the clearing point was risen with increasing mole% of S-Bi6. However, crystalline phase and phase separation between isotropic of 5CB and crystalline phase of S-Bi6 was happening at 20 and 25 mole% of S-Bi6 in the mixed system.