Title:
NEGATIVE DIELECTRIC LIQUID CRYSTAL COMPOUND, PREPARATION THEREFOR, AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/121022
Kind Code:
A1
Abstract:
A negative dielectric liquid crystal compound, a preparation method therefor, and an application thereof. The compound has a structure as shown in general formula (I): the main chemical structure is dibenzothiophene or dibenzofuran. Such a structure has a large dielectric anisotropy in itself. A benzene ring is introduced into the molecular structure and fluorine atoms are introduced at the 4 and 6 positions at the same time, forming a strong synergistic effect, so that the negative dielectric anisotropy of the liquid crystal compound is high, and at the same time, the clearing point is significantly improved. The compound has relatively high optical anisotropy, moderate rotational viscosity and liquid crystal intermiscibility, excellent performance at low temperatures, and good thermal stability, chemical stability, optical stability, and mechanical properties.
Inventors:
JIANG KUN (CN)
DENG SHIYONG (CN)
HAN YAOHUA (CN)
DAI XIONG (CN)
XIE PEI (CN)
ZHANG HAIWEI (CN)
TANG WEI (CN)
SU XUEHUI (CN)
DENG SHIYONG (CN)
HAN YAOHUA (CN)
DAI XIONG (CN)
XIE PEI (CN)
ZHANG HAIWEI (CN)
TANG WEI (CN)
SU XUEHUI (CN)
Application Number:
PCT/CN2020/133013
Publication Date:
June 24, 2021
Filing Date:
December 01, 2020
Export Citation:
Assignee:
BEIJING BAYI SPACE LCD TECH CO LTD (CN)
International Classes:
C07D307/91; C07D333/76; C09K19/34
Domestic Patent References:
| WO2019021146A1 | 2019-01-31 | |||
| WO2019076709A1 | 2019-04-25 |
Foreign References:
| DE10336016A1 | 2005-02-17 | |||
| CN109265450A | 2019-01-25 |
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
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