Patent ID: 7727417

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 a hydrogen atom, or C 1 -C 20 alkyl wherein arbitrary —CH 2 — may be replaced by —O—, —S—, —COO—, —OCO—, —CH═CH—, —CF═CF— or —C≡C— and arbitrary hydrogen atom may be replaced by a halogen atom or C 1 -C 3 alkyl; the rings A 1 , A 2 , A 3 , A 4 and A 5 are each independently a benzene ring, a naphthalene ring, a thiophene ring, a piperidine ring, a cyclohexene ring, a bicyclooctane ring, a tetrahydronaphthalene ring or a cyclohexane ring, wherein arbitrary hydrogen atom may be replaced by a halogen atom, or alkyl, alkoxy or haloalkyl of 1-3 carbon atoms, —CH 2 — may be replaced by —O— or —S— and —CH═ may be replaced by —N═; Z 1 , Z 2 , Z 3 , Z 4 , Z 5 and Z 6 are each independently a single bond, or C 1 -C 4 alkylene wherein arbitrary —CH 2 — may be replaced by —O—, —S—, —COO—, —OCO—, —CSO—, —OCS—, —CH═CH—, —CF═CF— or —C≡C— and arbitrary hydrogen atom may be replaced by a halogen atom; 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, —C≡C—C≡N, —SF 5 , or C 1 -C 10 alkyl wherein arbitrary —CH 2 — may be replaced by —O—, —S—, —CH═CH— or —C≡C— and arbitrary hydrogen atom may be replaced by a halogen atom; l, m, n, o and p are each independently 0 or 1, and l+m+n+o+p≦4.