Patent ID: 7662442

Claim:
A trifluoronaphthalene derivative which is expressed by the general formula (I) wherein R a denotes a linear alkyl group of 1 to 7 carbon atoms or a linear alkenyl group of 2 to 7 carbon atoms, R b denotes a linear alkyl group of 1 to 7 carbon atoms, a linear alkoxyl group of 1 to 7 carbon atoms, a linear alkenyl group of 2 to 7 carbon atoms or a linear alkenyloxy group of 2 to 7 carbon atoms, M a and M p each independently denotes a single bond, —CH 2 CH 2 —, —OCH 2 —, —CH 2 O—, —OCF 2 — or —CF 2 O—, G a and G b each independently denotes a trans-1,4-cyclohexylene group or a 1,4-phenylene group, and p1 and p2 each independently denotes 0 or 1, with a total of p1 and p2 being 0 or 1.