Use of chiral, uncharged metal compounds as dopants for liquid-crystalline materials
申请人:BASF AKTIENGESELLSCHAFT
公开号:US20030066984A1
公开(公告)日:2003-04-10
Improved liquid crystalline materials may be prepared by doping liquid crystalline materials with chiral, uncharged metal compounds of formula [(P
1
—Y
1
—A
1
—Y
2
—M
1
—Y
3
—)
n
L]
2
Me or [(P
1
—Y
1
—A
1
—Y
2
—M
1
—Y
3
—)
n
L]Me(L′(—Y
6
—M
2
—Y
5
—A
2
—Y
4
—P
2
)
n′
)
m
. Groups P
1
and P
2
may be, independently, hydrogen, C
1
-C
12
-alkyl groups, polymerizable groups, or radicals containing a polymerizable group. Y
1
to Y
6
may be, independently, single chemical bonds, ether groups, thio groups, carbonyl groups, acid groups, etc. Groups A
1
and A
2
are spacers having from 1 to 30 carbon atoms, and M
1
and M
2
are mesogenic groups. Me may be a transition metal from the fourth, fifth or sixth period of the periodic table, except for technetium, silver, cadmium, gold, mercury, or any of the lanthanoids, or Me may be a main group element from group 14 (IUPAC system), except for carbon and lead. L is a tridentate ligand, and L′ is an organic group having up to 12 carbon atoms.
通过用手性,不带电的金属化合物掺杂液晶材料的方法可以制备改进的液晶材料,其化学式为[(P1—Y1—A1—Y2—M1—Y3—)nL]2Me或[(P1—Y1—A1—Y2—M1—Y3—)nL]Me(L′(—Y6—M2—Y5—A2—Y4—P2)n′)m。其中,P1和P2可以独立地是氢、C1-C12烷基、可聚合基团或含有可聚合基团的基团。Y1到Y6可以独立地是单一化学键、醚基、硫基、羰基、酸基等。A1和A2是具有1到30个碳原子的间隔基团,而M1和M2是介向基团。Me可以是周期表第四、五或六周期的过渡金属,但不包括锝、银、镉、金、汞或任何镧系元素,或者Me可以是主族元素14族(IUPAC系统)中的元素,但不包括碳和铅。L是三齿配体,而L′是具有最多12个碳原子的有机基团。