| abstract |
A mesomorphic compound represented by the following formula (I):n wherein R 1 and R 2 respectively denote an alkyl group having 1 - 16 carbon atoms optionally substituted; X 1 and X 3 respectively denote a single bond, -0-,n X 2 denotes a single bond,n A 1 denotes a single bondn n A3 denotesn n A 2 denotes 9, 10-dihydro-2,7-phenanthrenediyl, 2,7-fluorenediyl or 2,7-fluorenonediyl; n is 0 or 1; and X 4 and X 5 respectively denote hydrogen, F, Cl, Br, -CH 3 , -CN or -CF 3 , with proviso that X 1 is a single bond when A 1 is a single bond. |