Compound, liquid crystal composition and photoelectric display device thereof

Patent metadata

Field	Value
Publication number	US-2020255738-A1
Application number	US-202016861320-A
Country	US
Kind code	A1
Filing date	Apr 29, 2020
Priority date	Nov 23, 2017
Publication date	Aug 13, 2020
Grant date	—

Abstract

A compound having the structure of general formula I is useful as a liquid crystal composition and as a photoelectric display device including the liquid crystal composition. The compound having the structure of general formula I is chemically and physically stable, and has higher clearing point, and both large dielectric anisotropy and large optical anisotropy at the same time. The compound having the structure of general formula I is well compatible with other liquid crystal compounds when applied in a liquid crystal composition, the composition has good stability especially in a low-temperature environment, the characteristic of fast response and a wide range of applicabilities, especially applicable to the IPS-type and TN-TFT-type liquid crystal display devices.

First claim

We claim:

1 . A compound having the structure of general formula I:

in which,
R represents a C 1-18 alkyl or a C 2-18 alkenyl, one or more —CH 2 — in the alkyl or alkenyl can each be independently replaced by —O— or —CO— in a manner that oxygen atoms are not directly connected, one or more —H in the alkyl or alkenyl can be substituted by halogen or —CH 3 ;
X represents —F, —OCF 3 or —CF 3 ;
L 1 to L 6 each independently represents —H or —F;
Z 1 , Z 2 and Z 3 each independently represents a single bond, —CH 2 CH 2 —, —CH 2 O—, —CF 2 O—, —COO—, —OCO—, —C≡C—, —OCH 2 —, —OCF 2 —, —CF 2 CF 2 — or —CH═CH—;
ring

 and ring

 each independently represents

one or more —CH 2 — in

 can be replaced by —O—, and one or more —H on

 can be substituted by —F;
at least one of ring

 and ring

 represents

2 . The compound according to claim 1 , wherein X represents —F or —OCF 3 .

3 . The compound according to claim 2 , wherein Z 3 represents a single bond or —CF 2 O—.

4 . The compound according to claim 3 , wherein Z 1 and Z 2 each independently represents a single bond, —CH 2 CH 2 —, —CH 2 O— or —CF 2 O—.

5 . The compound according to claim 4 , wherein at least one of Z 1 , Z 2 and Z 3 is not a single bond.

6 . The compound according to claim 5 , wherein when ring

represents

on which —H is substituted by —F, Z 1 represents —CH 2 CH 2 — or Z 2 represents —CF 2 O—.

7 . The compound according to claim 1 , wherein at most four of L 1 to L 6 represents —F.

8 . The compound according to claim 7 , wherein L 3 and L 4 both represent —H.

9 . The compound according to claim 1 , wherein the compound is selected from a group consisting of the following compounds:

in which,
X represents —F or —OCF 3 ;
ring

 represents

 and one or more —H on

 can be substituted by —F;
L 7 and L 8 each independently represents H or F;
Z 2 represents —CH 2 CH 2 — or —CH 2 O—.

10 . The compound according to claim 9 , wherein when L 5 represents —F, X represents —F.

11 . A liquid crystal composition, wherein the liquid crystal composition comprises:
at least one compound of general formula I according to claim 1 ; at least one compound selected from a group consisting of the compounds of general formulas II-1 to II-4

at least one compound selected from a group consisting of the compounds of general formula III-1 and general formula III-2

in which,
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 9 and R 10 each independently represents a C 1-7 alkyl or alkoxy, or a C 2-7 alkenyl or alkenoxy;
R 8 represents —F, a C 1-7 alkyl or alkoxy, or a C 2-7 alkenyl or alkenoxy;
L 9 to L 12 each independently represents —H or —F;
X 1 represents —F, a C 1-18 alkyl or a C 2-18 alkenyl, one or more —CH 2 — in the alkyl or alkenyl can each be independently replaced by —O— in a manner that oxygen atoms are not directly connected, one or more —H in the alkyl or alkenyl can be substituted by halogen, and when X 2 represents alkyl or alkenyl, or, when one or more —CH 2 — in the alkyl or alkenyl each is independently replaced by —O— in a manner that oxygen atoms are not directly connected, at least one of L 10 to L 12 represents —F;
ring

 represents

 one or more —CH 2 — in

can be replaced by —O—, and one or more —H on

 can be substituted by —F;
Z 4 and Z 5 each independently represents a single bond, —CH 2 CH 2 —, —CH 2 O—, —CF 2 O—, —OCH 2 — or —OCF 2 —;
n represents 1 or 2, and when n represents 2, ring

 can be same or different, and Z 4 can be same or different.

12 . The liquid crystal composition according to claim 11 , wherein the compound of general formula I is selected from the group consisting of the compounds of general formulas I-1 to I-12 according to claim 9 .

13 . The liquid crystal composition according to claim 12 , wherein the compound of general formula I provides 1-50% of the total weight of the liquid crystal composition, the compound selected from the group consisting of the compounds of general formulas II-1 to II-4 provides 5-75% of the total weight of the liquid crystal composition, and the compound selected from the group consisting of the compounds of general formula III-1 and general formula III-2 provides 1-50% of the total weight of the liquid crystal composition.

14 . The liquid crystal composition according to claim 13 , wherein the liquid crystal composition comprises at least one compound selected from a group consisting of the compounds of general formula II-1-a and general formula II-1-b:

15 . The liquid crystal composition according to claim 14 , wherein the liquid crystal composition comprises at least one compound selected from a group consisting of the compounds of general formulas II-2 to II-4.

16 . The liquid crystal composition according to claim 15 , wherein in the compound selected from the group consisting of the compounds of general formula III-1 and general formula III-2,

Assignees

• Jiangsu Hecheng Display Tech

Inventors

• Han Wenming
• Zhang Wenqi
• Ma Wenyang
• Chen Zhaoyuan

Classifications

• C07D319/06 Primary

  not condensed with other rings · CPC title

• C09K2019/3422

  the heterocyclic ring being a six-membered ring · CPC title

• C09K19/3402 Primary

  having oxygen as hetero atom (sugars C09K19/0422) · CPC title

• C09K19/44

  containing compounds with benzene rings directly linked · CPC title

• C09K2019/301

  Cy-Cy-Ph · CPC title