Patent ID: 7879413

Claim:
A liquid crystal composition, comprising a compound represented by formula (1) and a chiral dopant and exhibiting an optically isotropic liquid crystal phase, wherein R 1 is C 1 -C 20 alkyl wherein arbitrary —CH 2 — may be replaced by —O—, —S— or —CH═CH—; the ring A 1 is 1,4-cyclohexylene, 1,3-dioxan-2,5-diyl, 1,4-phenylene, or 1,4-phenylene with arbitrary hydrogen atom being replaced by a halogen atom; the rings A 2 , A 3 , A 4 , A 5 and A 6 are each independently 1,4-phenylene, or 1,4-phenylene with arbitrary hydrogen atom being replaced by a halogen atom; Z 1 , Z 2 , Z 3 , Z 4 , Z 5 and Z 6 are each independently a single bond, —CH 2 CH 2 —, —CH═CH—, —C≡C—, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 O—, —OCH 2 —, —CF═CF—, —(CH 2 ) 4 —, —(CH 2 ) 2 CF 2 O—, —(CH 2 ) 2 OCF 2 —, —CF 2 O(CH 2 ) 2 —, —OCF 2 (CH 2 ) 2 —, —CH═CH—(CH 2 ) 2 — or —(CH 2 ) 2 —CH═CH—; L 1 , L 2 , L 3 and L 4 are each independently a hydrogen atom or a halogen atom; X 1 is a hydrogen atom, a halogen atom, —C≡N, —N═C═S, —SF 5 , or C 1 -C 10 alkyl wherein arbitrary —CH 2 — may be replaced by —O—, —S— or —CH═CH— and arbitrary hydrogen atom may be replaced by a halogen atom; l, m, n, o, p and q are each independently 0 or 1, and l+m+n+o+p+q=3.