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US 7,014,890 B2Granted
Fluorinated naphthalenes, liquid-crystal mixtures comprising them, and liquid-crystal displays
AssigneeMerck Patent GmbH
InventorsMatthias Bremer, Melanie Klasen-Memmer, Barbara Hornung, Wolfgang Schmidt, Rainer Wingen
Life of this patent
Estimating the term…
Abstract
Compounds of the formula (I) in which the parameters are as defined herein, are suitable for use in liquid-crystal media and liquid-crystal displays which contain these media.
Claims34
A compound of formula (I)
- in which
- R1 and R2, independently of one another, are each H, linear alkyl having from 1 to 12 carbon atoms or linear or branched alkenyl having from 2 to 8 carbon atoms, in which, in said alkyl and alkenyl,
- a) a non-terminal —CH2— group may be replaced by —O— or —C(═O)O— and/or
- b) a —CH2— group may be replaced by —C≡C—, cyclopropane-1,2-diyl or cyclobutane-1,3-diyl and/or
- c) one or more H atoms may be replaced by F,
- with the proviso that R1 and R2 are not simultaneously H;
- M1 and M2, independently of one another, are each —C(═O)O—, —OC(═O)—, —CH2O—, —OCH2—, —C≡C—, —CH2CH2—, —(CH2)4—, —CF2CF2—, —CF2O—, —OCF2— or a single bond;
- >E1-E2- is >C═CH— or >CH—CH2—;
- m and n, independently of one another, are each zero, 1 or 2, with the proviso that the sum m+n is zero, 1 or 2;
- p is zero or 1;
- and
- independently of one another, are each phenylene-1,4-diyl, optionally monosubstituted or polysubstituted by F, cyclohexane-1,4-diyl, optionally monosubstituted or disubstituted by F, 1-cyclohexene-1,4-diyl, optionally monosubstituted by F, or 1,3-dioxane-2,5-diyl.
9 more elements
A compound selected from the following formulae:
- in which
- R1 and R2, independently of one another, are each H, linear alkyl having from 1 to 12 carbon atoms or linear or branched alkenyl having from 2 to 8 carbon atoms, in which, in said alkyl and alkenyl,
- a) a non-terminal —CH2— group may be replaced by —O— or —C(═O)O— and/or
- b) a —CH2— group may be replaced by —C≡C—, cyclopropane-1,2-diyl or cyclobutane-1,3-diyl and/or
- c) one or more H atoms may be replaced by F,
- with the proviso that R1 and R2 are not simultaneously H, and in formula Z1
- R1 is not H;
- q is 0 or 1. and
- Me is methyl.
6 more elements
A compound selected from the following formulae:
- in which
- R1 and R2, independently of one another, are each H, linear alkyl having from 1 to 12 carbon atoms or linear or branched alkenyl having from 2 to 8 carbon atoms, in which, in said alkyl and alkenyl,
- a) a non-terminal —CH2— group may be replaced by —O— or —C(═O)O— and/or
- b) a —CH2— group may be replaced by —C≡C—, cyclopropane-1,2-diyl or cyclobutane-1,3-diyl and/or
- c) one or more H atoms may be replaced by F,
- with the proviso that R1 and R2 are not simultaneously H;
- q is 0 or 1. and
- Me is methyl.
5 more elements
Dependencies are inferred from the claim text.