Abstract: A new class of asymmetric polar diphenyldiacetylene liquid crystal compounds and method for preparation are disclosed. The new class of liquid crystal compounds comprises the basic structure: Wherein R1 is an alkenyl group having the general formula (C2H2n−1), X is a cyano group, a fluoro group, CF3, OCF3, or a chloro group, Y1 is unsubstituted, a fluoro group, a chloro group or a methyl group, Y2 is unsubstituted, a fluoro group, a chloro group, or a methyl group, Z1 is unsubstituted, a fluoro group, or a methyl group, and Z2 is unsubstituted, a fluoro group, or a methyl group. The compounds disclosed exhibit high birefringence, low rotational viscosity, and have unexpectedly broad nematic ranges. Also disclosed are eutectic mixtures comprising at least one polar diphenyldiacetylene having the general structure described above. The eutectic mixtures also have unexpectedly broad nematic ranges.