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US 12,312,529 B2Granted
Liquid crystal compounds
AssigneeMerck Patent GmbH
InventorsMatthias Bremer, Atsutaka Manabe, Martin Kraska
Life of this patent
Estimating the term…
Abstract
New compounds and their mixtures enable the formation of the ferroelectric nematic liquid crystalline phase at ambient temperature. Compounds of the formula I are presented, in which the variable groups have the meanings indicated in claim 1. Liquid crystal media comprise at least one compound of the formula I.
Claims23
A compound of the formula I,
- in which
- X1 denotes CN, F, CF3, OCF3, SCN, NCS, SF5 or O—CF═CF2,
- Z1 denotes-C(O)O—,
- L1 H or CH3,
- R1 denotes an alkyl radical having 1 to 15 C atoms, where one or more CH2 groups in these radicals are optionally replaced, independently of one another, by —C≡C—, —CH═CH—,
- —O—, —S—, —CO—O— or
- —O—CO— in such a way that O and S atoms are not linked directly to one another, and in which one or more H atoms are each optionally replaced by halogen, or denotes H.
4 more elements
A compound according to the following formula:
- wherein
- R1 is an alkyl radical having 1 to 15 C atoms, where one or more CH2 groups in these radicals are optionally replaced, independently of one another, by —C≡C—, —CH═CH—,
- —O—, —S—, —CO—O— or —O—CO— in such a way that O and S atoms are not linked directly to one another, and in which one or more H atoms are each optionally replaced by halogen, or denotes H.
A liquid crystal medium comprising at least one compound of the formula I
- in which
- X1 denotes CN,
- Z1 denotes —C(O)O— or —CF2O—,
- L1 H or CH3, and
- R1 denotes an alkyl radical having 1 to 15 C atoms, where one or more CH2 groups in these radicals are optionally replaced, independently of one another, by —C≡C—, —CH═CH—,
- —O—, —S—, —CO—O— or
- —O—CO— in such a way that O and S atoms are not linked directly to one another, and in which one or more H atoms are each optionally replaced by halogen, or denotes H.
4 more elements
Dependencies are inferred from the claim text.