LIQUID CRYSTAL POLYMERS

摘要

Compounds of formula (I) are provided which may be used in a variety of devices including liquid crystal devices, piezoelectric devices, pyroelectric devices and in optical recording media, m = at least 5 and not greater than 50; X3 is selected from formula (IA) wherein Y is selected from CO or CH2; n = 1-15; Q is independently selected from COO, OCO, O, S, CH2; q = 0-15 provided that when q = O then only one of Q or Z is present; Z is independently selected from O, S, single bond, COO, OCO, CH2, NH, NR, NR<1> wherein R is C1-12 n-alkyl or C1-12 branched alkyl wherein the branched alkyl group may be achiral or chiral and R<1> is (CH2)tE where t may be 1-15 and E can be selected from OH, CO2H, Br, Cl, I, SH, NH2, N(CH3)H; (a) represents any mesogenic group; X3 is also independently selected from H, OH, OCOR<2>, COOH, CO2R<2>, (CH2)pOH, (CH2)pCO2H, -(CH2)pOR<2> or -(CH2)pCO2R<2> and p = 1-20, R<2> = H or C1-16 alkyl, when R<2> = C2-16 alkyl the terminal CH3 group may be replaced by Br or Cl; provided that at least one of X3 is selected from formula (IA).