Liquid crystal compounds, preparation thereof, and composition containing the same
AssigneeIndustrial Technology Research Institute
InventorsDao-Hung Lee, Ding-Jen Chen, Kung-Lung Cheng
Life of this patent
Estimating the term…
Abstract
A liquid crystal compound with high helical twisting power, a method for preparing the same, and a liquid crystal composition containing the same. The liquid crystal compounds include cyclic group chain structures similar to the liquid crystal to serve as the core structure, and multi-ring structures of natural alcohol with optical activity, such as alcoholates of terpenol, borneol, cinchonidine, quinine, or derivatives thereof. As a result, the liquid crystal composition containing the liquid crystal compounds can filter out light of specific wavelengths from incident light due to optical activity and high helical twisting power thereof.
Claims15
A liquid crystal compound with high helical twisting power having a formula (I), of:
- or a formula (II), of:
- wherein
- A′ comprises naturally occurring organic multi-ring alcoholates selected from alcoholates of cinchonidine, and quinine;
- A comprises naturally occurring organic multi-ring alcoholates selected from alcoholates of terpenol, borneol, cinchonidine, and quinine;
- R1 is hydrogen, alkyl, thioalkyl, or alkyloxy group, wherein alkyl, thioalkyl, and alkyloxy group can be straight or branched and have 1 to 10 carbon atoms optionally substituted with at least one fluorine atom;
- n is 1, 2, or 3;
- and
- G is the same or different and is unsubstituted or substituted cycloalkyl, heterocyclic, aryl, heteroaryl, arylalkyl, or heteroarylalkyl group, and is optionally substituted with at least one fluorine atom, alkyl, or alkyloxy group.
A method for preparing liquid crystal compounds with high helical twisting power, comprising:
- reacting an organic acid represented by a formula (III) of:
- or a formula (IV) of:
- and a natural alcohol with optical activity undergoing esterification to obtain a liquid crystal compound represented by a formula (I) of:
- or a formula (II) of:
- wherein
- A′ comprises naturally occurring organic multi-ring alcoholates selected from alcoholates of cinchonidine, and quinine;
- A comprises naturally occurring organic multi-ring alcoholates selected from alcoholates of terpenol, borneol, cinchonidine, and quinine;
- R1 is hydrogen, alkyl, thioalkyl, or alkyloxy group, wherein alkyl, thioalkyl, and alkyloxy group can be straight or branched and have 1 to 10 carbon atoms optionally substituted with at least one fluorine atom;
- n is 1, 2, or 3;
- and
- G is the same or different and is unsubstituted or substituted cycloalkyl, heterocyclic, aryl, heteroaryl, arylalkyl, or heteroarylalkyl group, and is optionally substituted with at least one fluorine atom, alkyl, or alkyloxy group.
A liquid crystal composition, comprising:
- at least one liquid crystal compound represented by a formula (I) of:
- or a formula (II) of:
- at a ratio from 3 wt % to 30 wt %, based on the weight of the liquid crystal composition,
- wherein
- A′ comprises naturally occurring organic multi-ring alcoholates selected from alcoholates of cinchonidine, and quinine;
- A comprises naturally occurring organic multi-ring alcoholates selected from alcoholates of terpenol, borneol, cinchonidine, and quinine;
- R1 is hydrogen, alkyl, thioalkyl, or alkyloxy group, wherein alkyl, thioalkyl, and alkyloxy group can be straight or branched and have 1 to 10 carbon atoms optionally substituted with at least one fluorine atom;
- n is 1, 2, or 3;
- and
- G is the same or different and is unsubstituted or substituted cycloalkyl, heterocyclic, aryl, heteroaryl, arylalkyl, or heteroarylalkyl group, and is optionally substituted with at least one fluorine atom, alkyl, or alkyloxy group;
- and
- a liquid crystal at a ratio from 3 wt % to 97 wt %, based on the weight of the liquid crystal composition.
Dependencies are inferred from the claim text.