摘要:
A liquid crystalline medium based on a mixture of moderately polar compounds contains one or more compounds of general formula (I), where the individual residues have the following meanings: R stands for alkyl, oxalkyl, fluoralkyl or alkenyl, each of which has up to 7 carbon atoms, (a) stands for (b), (c) or (d), X stands for F, Cl, CF3, OCHF2, OCF2Cl or OCF3, and Y stands for H or F.
摘要:
The invention relates to fluorinated biphenyl derivatives of formula (I), wherein R1 denotes an alkyl residue with up to 12 carbon atoms wherein one or two non-adjacent CH¿2?-groups may also be replaced by -O-, -O-CO-, -CO-O- and/or -CH=CH-, m is 0 or 1, and X is -OCF3, -OCHF2 or, if m denotes 1, also F, CF3 or NCS.
摘要:
Disclosed are difluorobenzonitriles of the formula (I) in which Y is an alkyl, alkenyl, alkoxy, oxaalkyl or alkenyloxy with 1-12 C-atoms, one of the residues A?1 and A2¿ in the molecule is (a), in which X is CH or N, and the other residue A1 or A2 is selected from the following: (b) and (c), one of the residues Z?1 and Z2¿ is a single bond and the other residue Z1 or Z2 is -CH¿2?CH2- or a single bond and m is 0 or 1, with the provision that, if m = 1, Z?1 = Z2¿ = a single bond and one of the residues A?1 and A2¿ = pyrimidine-2,5-diyl and the other residue A1 or A2 = 1,4-phenylene, then A1 is pyrimidine-2,5-diyl.
摘要:
L'invention concerne un milieu de cristaux liquides à base d'un mélange de composés polaires à anisotropie diélectrique positive, caractérisé en ce qu'il renferme un ou plusieurs composés de formule (I) dans laquelle Hal désigne le fluor ou le chlore, et R désigne un alkyle, oxa-alkyle, fluoro-alkyle ou alcényle ayant chacun jusqu'à 7 atomes de carbone.
摘要:
Trifluortoluol derivates having formula (I), in which R1 means alkyl with 1 to 12 C atoms, in which one or several non-adjacent CH2 groups may be substituted by -O-, -CO-, -O-CO-, -CO-O-, -O-CO-O-, -CH halogen, -CH-CN- and/or -CH=CH-; A1 and A2 means independently from each other 1,4 phenylene, unsubstituted or substituted one or several times with halogen, nitrile and/or CH3, in which one or two non-adjacent CH2 groups may be substituted with -O- and/or -S-, or 1,4-bicyclo(2,2,2)octylen, Z1 and Z2 mean independently from each other -CO-O-, -O-CO-, -CH2O-, -OCH2-, -CH2CH2- or a simple bond and n means 0 or 1. These derivates are used as components of chirally oriented smectic phases.
摘要:
Des composés de trifluorotoluène de formule (I), où n vaut entre entre 1 et 12 et Q est (a), (b), (c), (d) ou (e), conviennent comme constituants de milieux cristallins liquides.
摘要:
L'invention concerne des dérivés de byphényles fluorurés de formule (I), dans laquelle R1 représente un reste d'alkyle contenant jusqu'à 12 atomes de carbone, dans lequel un ou deux groupes CH2 non adjacents peuvent également être remplacés par -O-, -O-CO-, -CO-O- et/ou -CH=CH-, m représente 0 ou 1, et X représente -OCF3, -OCHF2 ou, si m représente 1, il représente également F, CF3 ou NCS.
摘要:
Composés selon la formule (I): R-(A1-Z1)m-A2-Q-CHF2, où R, A1, Z1, m, A2 et Q ont les significations indiquées dans la revendication 1. Lesdits composés peuvent servir de constituants de milieux à cristaux liquides.
摘要:
Cyclohexane derivatives of formula R1-A1-Z1-A2-R2 in which R1 and R2 are in each case an alkyl group with 1-10 C atoms, in which also one or two non neighboring CH2 groups can be replaced by O atoms and/or -CO- groups and/or -CO-O- groups and/or -CH=CH- groups, one of the remainder R1 and R2, also H, F, Cl, Br, CN or R3-A3-Z2-, A1 is -A-, A4-A- or -A-A4-, A is a substituted trans-1,4-cyclohexyl group substituted in 2nd, 3rd, 5th and/or 6th position, substituted once or substituted several times by F and/or Cl and/or Br and/or CN and/or an alkyl group or a fluoridated alkyl group, each with 1-10 atoms, in which also one or two not neighboring CH2 groups can be replaced by O atoms and/or -CO- groups and/or -CO-O- groups; which also, as the case may be, can be substituted in 1st and/or 4th position, A2, A3 and A4 are in each case an unsubstituted 1,4-phenylene, or a 1,4-phenyl substituted by one or two F and/or Cl atoms and/or CH3 groups and/or CN groups, in which also one or two CH groups can be replaced by N atoms and/or NO, 1,4-cyclohexylene, in which one or two not neighboring CH2 groups may be substituted by O atoms, 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene-, decahydronaphthalene-2,6-diyl-, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl groups, Z1 and Z2 are either -CO-O-, -O-CO-, -CH2CH2-, OCH2-, -CH2O or a single link, and R3 is H, an alkyl group with 1-10, in which also one or two not-neighboring CH2 groups can be replaced by O atoms and/or -CO- groups and/or -CO-O- groups and/or -CH=CH- groups; F, Cl,Br or CN, it being understood that if Z1 = -CO-O- A1 in beta-position, to the -CO-O- bridge it carries no equatorial substitutes, are suitable as components for liquid crystal phases.