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US 7,425,281 B2Granted
Liquid crystal compositions comprising an organogermanium compound and methods for using the same
AssigneeDisplaytech, Inc.
InventorsMichael D. Wand, Kundalika M. More, William N. Thurmes
Life of this patent
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Abstract
The present invention provides organogermanium compounds and liquid crystal compositions comprising such a compound.
Claims28
A liquid crystal composition comprising at least two different compounds, wherein at least one of the compounds is an organogermanium compound of the formula:
- D-E-F;
- wherein
- D is a chain having from about 5 to about 20 chain atoms, wherein each of the chain atoms is independently selected from the group consisting of C, O, N, S, and Si;
- E is a core moiety having two, three, or four ring moieties, wherein each ring moiety is connected to the other ring moiety by a linker, and wherein each linker is independently comprised of from 0 to about 5 chain atoms;
- F is a moiety of the formula:
- —[Y]b-R3—[Si(R4)2]c—R5—GeR6R7R8
- wherein
- each of b and c is independently 0 or 1;
- Y is O, S, C(═W),-Z-C(═W)—;
- —C(═W)-Z-, —C≡C—, or NR2;
- W is O or S;
- Z is O, S or NR9;
- each of R2 and R9 is independently hydrogen, alkyl, or a nitrogen protecting group;
- each of R3 and R5 is independently selected from the group consisting of alkylene, haloalkylene, heteroalkylene, alkenylene, alkynylene, heteroalkenylene, and heteroalkynylene;
- each R4 is independently selected from the group consisting of hydrogen or C1-4 alkyl;
- and
- each of R6, R7, and R8 is independently C1-4 alkyl.
14 more elements
A liquid crystal composition which is in a liquid crystal phase at room temperature, said liquid crystal composition comprising an organogermanium compound.
An enantiotropic liquid crystal composition comprising an organogermanium compound.
A liquid crystal organogermanium compound of the formula:
- D-E-F;
- wherein
- D is a chain having from about 5 to about 20 chain atoms, wherein each of the chain atoms is independently selected from the group consisting of C, O, N, S, and Si;
- E is a core moiety having two, three, or four ring moieties, wherein each ring moiety is connected to the other ring moiety by a linker, and wherein each linker is independently comprised of from 0 to about 5 chain atoms;
- F is a moiety of the formula:
- —[Y]b—R3—[Si(R4)2]c—R5—GeR6R7R8
- wherein each of b and c is independently 0 or 1;
- Y is O, S, C(═W), -Z-C(═W)—;—C(═W)-Z-,—C≡C—, or NR2;
- W is O or S;
- Z is O, S or NR9;
- each of R2 and R9 is independently hydrogen, alkyl, or a nitrogen protecting group;
- each of R3 and R5 is independently selected from the group consisting of alkylene, haloalkylene, heteroalkylene, alkenylene, alkynylene, heteroalkenylene, and heteroalkynylene;
- each R4 is independently selected from the group consisting of hydrogen or C1-4 alkyl;
- and
- each of R6, R7, and R8 is independently C1-4 alkyl.
12 more elements
A compound of the Formula:
- D-E-F;
- wherein
- D is a chain having from about 5 to about 20 chain atoms, and wherein D is a moiety of the formula:
- R1—[X]a—
- wherein
- a is 0 or 1;
- X is O, S, C(═W),-Z-C(═W)—;
- —C(═W)-Z-,—C≡C—, or NR2;
- W is O or S;
- Z is O, S or NR9;
- R1 is selected from the group consisting of alkyl, haloalkyl, heteroalkyl, alkenyl, alkynyl, heteroalkenyl, and heteroalkynyl;
- and
- each of R2 and R9 is independently hydrogen, alkyl, or a nitrogen protecting group;
- E is a core moiety having two, three, or four ring moieties, wherein each ring moiety is connected to the other ring moiety by a linker, and wherein each linker is independently comprised of from 0 to about 5 chain atoms;
- F is a moiety of the formula:
- —[Y]b—R3—[Si(R4)2]c—R5—GeR6R7R8
- wherein each of b and c is independently 0 or 1;
- Y is O, S, C(═W), -Z-C(═W)—;—C(═W)-Z-,—C≡C—, or NR2;
- W is O or S;
- Z is O, S or NR9;
- each of R2 and R9 is independently hydrogen, alkyl, or a nitrogen protecting group;
- each of R3 and R5 is independently selected from the group consisting of alkylene, haloalkylene, heteroalkylene, alkenylene, alkynylene, heteroalkenylene, and heteroalkynylene;
- each R4 is independently selected from the group consisting of hydrogen or C1-4 alkyl;
- and
- each of R6, R7, and R8 is independently C1-4 alkyl.
22 more elements
Dependencies are inferred from the claim text.