CHIRAL ESTERS OF PHENYL-ALCANOIC ACIDS SUBSTITUTED IN ALPHA AND MESOGEN HYDROXYLIC COMPOUNDS AND THEIR USE AS A DOPING SUBSTANCE IN LIQUID CRYSTAL PHASES.

摘要

THE NEW COMPOUNDS RESPOND TO THE GENERAL FORMULA (I) IN WHICH MO = REST OF A HYDROXYLIC COMPOUND MESOGENO MOH AFTER SEPARATING AN H, MO RESPONDING TO THE GENERAL FORMULA (II) IN WHICH R2 = ALKYL (C1-C12) LINEAR OR BRANCHED, MAY BE REPLACED ONE OR TWO CH2 GROUPS NOT CONTAINED BY ATOMES OF OY / OS, OR, IN CASE OF N1 = 1 ALSO F, CL, BR, CN OR CF3. A1, A2, INDEPENDENTLY BETWEEN SI = 1,4-PHENYLENE, DIAZIN-2,5-DIILO, DIAZIN-3,6-DIILO, 1,4-CYCLLOHEXYLENE, 1,3-DIOXAN-2,5-DIILO, 1, 3-DITIAN-2,5-DIILO OR 1,4-BICYCLE (2,2,2) OCTILENE, MAY BE THESE GROUPS AT LEAST, MONOSUSTITUTED WITH F, CL, BF, CN, CF3 AND / OR ALKYL (C1-C12 ) (OPTIONALLY TWO CH2 NOT CONTIGATED ARE REPLACED BY OY / OS). B = CO-O, O-CO, CH2-CH2, OCH2, CH = N, N = CH, N = N, N (O) = N. N1, N2, N3 = 0, 1 O2 COULD NOT BE ZERO AT THE SAME TIME N1 AND N3. Y = A SUBSTITUTE FOR ELECTRON ACCEPTOR. Z = HO AN ELECTRONIC ACCEPTOR DIFFERENT FROM Y. R1 = BENCILUS OR PHENYL MAY BE SUBSTITUTED IN THE AROMATIC PART AS A1 AND A2, EXCEPTING THE COMPOUNDS WITH Z = H, Y = F, CL OR BR, R2 = ALCOXI (C1- C11), A1, A2 = PHENYL, N1, N3 = 1 AND N2 = 0. THE COMPOUNDS ARE PREFERABLY USED IN LIQUID CRYSTAL PHASES THAT TRANSFORM THEM INTO FERROELECTRIC PHASES. THEY PRESENT HIGH VALUES OF SPONTANEOUS POLARIZATION.