US 9,517,990 B2 · Negative dielectric anisotropic liquid crystal compounds containing 2,3-difluorophenyl group, and preparation method and use thereof

Abstract

A negative dielectric anisotropic liquid crystal compound containing 2,3-difluorophenyl, and a preparation method and use thereof are disclosed. The compound has a general structural formula as shown in Formula I. The negative dielectric anisotropic liquid crystal compound has a negative dielectric anisotropy (Δ∈), and has cyclobutyl or cyclopentyl as a terminal group. Compared with conventional liquid crystal compounds with a flexible alkyl chain as a terminal group, the compound of Formula I according to the present invention has the advantage of high clearing point, and enables extension of the application range of a liquid crystal mixture because a positive correlation exists between the clearing points of the liquid crystal mixture and monomer liquid crystal compounds. In addition, the compound can increase the absolute value of the negative dielectric constant of the liquid crystal mixture, thus having an important application value.

Claims15

Dependent claims

A compound of Formula I:

wherein H is cyclopentyl;
is selected from 1,4-phenylene, 1,4-phenylene substituted with fluoro, 1,4-cyclohexyl, and 1,4-cyclohexyl in which one or two —CH2— is substituted with O;
Z is selected from a single bond, —COO—, —CH2O—, and —CH2CH2—;
R is selected from C1-C6 alkyl and C1-C6 alkoxy;
and
m is 1 or 2.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/407,652Filed 19 Nov 2013

Priority

CN 2012 1 048329023 Nov 2012

Published

US 2015/0152330 A14 Jun 2015

Granted

13 Dec 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

C07C 43/247
Having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring and to a carbon atom of a ring other than a six-membered…:…
C07C 43/225
Having an ether-oxygen atom bound to a carbon atom of a six-membered aromatic ring: containing halogen
C09K 19/30
Containing at least two non-condensed rings: containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
C09K 19/3066
Cyclohexane rings: in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers

Negative dielectric anisotropic liquid crystal compounds containing 2,3-difluorophenyl group, and preparation method and use thereof

Life of this patent

Negative dielectric anisotropic liquid crystal compounds containing 2,3-difluorophenyl group, and preparation method and use thereof

Life of this patent

Abstract

Claims15