| abstract |
A compound of formula (1): wherein A 1 and A 2 are —O—, —NR—, —S—, or —CO—, in which R is a hydrogen atom or substituent; Z is one or two atoms selected from a carbon atom or a non-metal atom of Group 14, 15 or 16 in the Periodic Table, and forms a five- or six-membered ring with the C—C═C—C or C═C—C═C; R 1 , R 2 , and R 3 each are a substituent; m is an integer of 0 to 4; L 1 and L 2 are a single bond or divalent linking group; X is a non-metal atom of Group 14, 15 or 16 in the Periodic Table, and may have a hydrogen atom or R 4 ; and at least one of R, R 1 , R 2 , R 3 , and R 4 is substituted with a polymerizable group; a liquid crystal composition, an optical film, a retardation sheet, a polarizing plate, and a liquid crystal display. |