FLÜSSIGKRISTALLPOLYMERE

摘要

PCT No. PCT/GB96/02655 Sec. 371 Date May 26, 1998 Sec. 102(e) Date May 26, 1998 PCT Filed Oct. 31, 1996 PCT Pub. No. WO97/16472 PCT Pub. Date May 9, 1997Compounds of formula are provided which may be used in a variety of devices including liquid crystal devices, piezoelectric devices, pyroelectric devices and in optical recording media, where m=at least 5; and Rx, Ry and Rz are independently from formula (IA), where Y is selected from COO, OCO, O, S, CHOH, CHF, CH2; Q=(CH2)n wherein one or more non-adjacent methylenes may be replaced by O and n=1-20; Z is selected from O, S, a single covalent bond, COO, a OCO; when Y is CH2 then n may also be 0; formula (IB) is and represents any mesogenic group; and Rx, Ry and Rz are also independently selected from H, OH, OCOR1, COOH, CO2R1 (CH2)pOH, (CH2)pCO2H, -(CH2)pOR1 or -(CH2)pCO2R1 and p=1-20, R1=H or C1-16alkyl, when R1=C2-16alkyl the terminal CH3 group may be replaced by Br or Cl; provided that at least one of and Rx, Ry and Rz is selected from formula (IA).