Cyclopentane as a Structural Fragment in Liquid Crystals

Abstract

The effect on the physico-chemical properties of introducing cyclopentane and cyclopentane based fragments into the molecular structure of liquid crystals is discussed and rationalized in terms of existent theories; a comparison is made with the corresponding derivatives containing other well-known fragments.

Keywords:

• Cyclopentane
• liquid crystals
• physico-chemical properties

Notes

^a τ = T_meas/T_N-I = 0.95, T_meas, T_N-I, K.

^b Extrapolated from 10 wt% solution in the mixture of cyanobiphenyls at 20°C.

^c Extrapolated from 10 wt% solution in ZLI-1132 at τ = 0.95.

^d Extrapolated from 10 wt% solution in ZLI-1132 at 20°C.

^a T_mean = T_SmC*-Ch−10°C.

^a Extrapolated from 10 wt% solution in ZLI-4792 at 20°C.

^a Extrapolated from 10 wt% solution in ZLI-4792 at 20°C.

^b Extrapolated from 10 wt% solution in ZLI-2857 at 20°C.

^c Rotational viscosity γ_I [mPas], extrapolated from 10 wt% solution in ZLI-4792 at 20°C.

^a Extrapolated from 10 wt% solution in ZLI-4792 at 20°C.

^{b, c} Extrapolated from 15 wt% solution in liquid crystal material at 25°C and 20°C, respectively.

^d volume viscosity η [mPas].

^e kinematic viscosity v [mm²s⁻¹].

^a Extrapolated from 10 wt% solution in ZLI-2857 at 20°C.

^b Extrapolated from 10 wt% solution in ZLI-4792 at 20°C.

^c ExirapoJated from 15 wt% solution in liquid crystal material at 25°C.

^a T_meas = T_SmC*-SmA − 40°C.