申请人:Kelly Stephen
公开号:US20050072963A1
公开(公告)日:2005-04-07
A compound of formula (I): where R
1
is alkyl or alkenyl, Y
1
and Y
2
are independently selected from oxygen or sulphur, n is an integer of from 1 to 5, A is an optionally substituted phenyl or an optionally substituted cycloalkyl ring, X is a direct bond, a C
1-4
alkylene, a C
2-4
alkenylene, an acetylene, —CO(O)— or a group of sub-formula (i): where X
1
and X
2
are independently selected from a direct bond, a C
1-4
alkylene, a C
2-4
alkenylene, an acetylene, —CO(O)— and R
2
, R
3
and R
4
are independently selected from hydrogen, halo or cyano, provided that no more than one of R
2
, R
3
and R
4
is hydrogen. These compounds have a high dipole moment and may be used as dopants in liquid crystal mixtures.
化合物的化学式为(I):其中R1是烷基或烯基,Y1和Y2分别选择自氧或硫,n为1至5的整数,A是可选取取代的苯基或可选取取代的环烷基,X是直接键,C1-4烷基,C2-4烯基,乙炔,-CO(O)-或亚式化学式(i)的基团:其中X1和X2分别选择自直接键,C1-4烷基,C2-4烯基,乙炔,-CO(O)-和R2、R3和R4分别选择自氢,卤素或氰基,但R2、R3和R4中最多只有一个是氢。这些化合物具有高偶极矩,可用作液晶混合物中的掺杂剂。