Polar nematic compounds, one example of which has the following structure: is a caged boron structure, where the sphere of the caged boron structure is C and each non-sphere vertex of the caged boron structure is B—H. R is H, an alkyl, a cycloalkyl, a bicycloalkyl, an alkenyl, a cycloalkenyl, a bi
Polar nematic compounds, one example of which has the following structure: is a caged boron structure, where the sphere of the caged boron structure is C and each non-sphere vertex of the caged boron structure is B—H. R is H, an alkyl, a cycloalkyl, a bicycloalkyl, an alkenyl, a cycloalkenyl, a bicycloalkenyl, an alkynyl, an acyl, an aryl, an alkylaryl, a halogen, a cyano group, or an isothiocyanoto group, or R is a group that forms an ether, a ketone, an ester, a thioester, a sulfide, or a sulfone. X is COOR′ or COSR′. R′ is H, an alkyl, a cycloalkyl, a bicycloalkyl, an alkenyl, a cycloalkenyl, a bicycloalkenyl, an alkynyl, an aryl, a halogen, or a cyano group. The compounds may be used in liquid crystal displays (LCDs), and in television sets, laptop computers, computer monitors, hand-held communication devices, gaming devices, watches, cash registers, clocks, and calculators having liquid crystal displays.
대표청구항▼
1. A compound comprising the following structure: wherein is a caged boron structure where the sphere of the caged boron structure is C and each non-sphere vertex of the caged boron structure is B—H;wherein R is H, an alkyl, a cycloalkyl, a bicycloalkyl, an alkenyl, a cycloalkenyl, a bicycloalkenyl
1. A compound comprising the following structure: wherein is a caged boron structure where the sphere of the caged boron structure is C and each non-sphere vertex of the caged boron structure is B—H;wherein R is H, an alkyl, a cycloalkyl, a bicycloalkyl, an alkenyl, a cycloalkenyl, a bicycloalkenyl, an alkynyl, an acyl, an aryl, an alkylaryl, a halogen, a cyano group, or an isothiocyanoto group, or where R is a group that forms an ether, a ketone, an ester, a thioester, a sulfide, or a sulfone;wherein X is COOR′ or COSR′; andwherein R′ is H, an alkyl, a cycloalkyl, a bicycloalkyl, an alkenyl, a cycloalkenyl, a bicycloalkenyl, an alkynyl, or an aryl. 2. The compound of claim 1, wherein R is H, a C2-C9 alkyl, a C2-C9 alkenyl, or a C2-C9 alkoxy. 3. The compound of claim 1, wherein R is propyl or heptyl. 4. The compound of claim 1, wherein X is COOR′. 5. The compound of claim 1, wherein R′ is H, a C2-C9 alkyl, a C2-C9 alkenyl, a C6-C8 cycloalkyl, or an aryl. 6. The compound of claim 1, wherein R′ is 7. The compound of claim 1, wherein the compound is: 8. A method of making the compound of claim 1, comprising: heating a mixture comprising and a thiocarbonyl to form an intermediate; andreacting the intermediate under hydrolytic conditions with RCH(CH2CH2X′)2, where X′ is a halogen. 9. A method of making the compound of claim 1, comprising heating a mixture comprising 10. A mixture comprising the compound of claim 1 and a nematic host. 11. A liquid crystal display comprising the compound of claim 1. 12. A television set, a laptop computer, a computer monitor, a hand-held communication device, a gaming device, a watch, a cash register, a clock, or a calculator comprising the liquid crystal display of claim 11.
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