Patent ID: 7674397

Claim:
A compound of formula I P—Sp—X—A 1 —(Z 1 —A 2 ) m —R I wherein P is a polymerisable or reactive group, Sp is a spacer group or a single bond, X is a linkage group or a single bond, A 1 and A 2 are independently of each other 1,4-phenylene or thiophene-2,5-diyl which is optionally substituted with one or more groups R 1 , R 1 has one of the meanings of R, Z 1 and Z 2 are independently of each other —O—, —S—, —CO—, —COO—, —OCO—, —O—COO—, —CO—NR 0 —, —NR 0 —CO—, —O—CO—NR 0 —, —NR 0 —CO—O—, —NR 0 —CO—NR 0 —, —OCH 2 —, —CH 2 O—, —SCH 2 —, —CH 2 S—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —CH 2 CH 2 —, —CF 2 CH 2 —, —CH 2 CF 2 —, —CF 2 CF 2 —, —CH═N—, —N═CH—, —N═N—, —CH═CR 0 —, —CY 1 ═CY 2 —, —C≡C—, —CH═CH—COO—, —OCO—CH═CH— or a single bond, R 0 and R 00 are independently of each other H or alkyl with 1 to 12 C-atoms, Y 1 and Y 2 are independently of each other H, F, Cl or CN, R is halogen, CN, NO 2 , NCS, SF 5 , Sn(R′) 3 , SiR′R″R′″, straight chain, branched or cyclic alkyl with 1 to 30 C-atoms, which is unsubstituted, mono- or polysubstituted by F, Cl, Br, I or CN, and wherein one or more non-adjacent CH 2 groups are optionally replaced, in each case independently from one another, by —O—, —S—, —NH—, —NR 0 —, —SiR′R″—, —CO—, —COO—, —OCO—, —OCO—O—, —S—CO—, —CO—S—, —CY 1 ═CY 2 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, an aromatic or heteroaromatic group, or P—Sp—X, R′, R″ and R′″ are independently of each other alkyl with 1 to 12 C-atoms, and m is 3, 4 or 5, with the provisos that a) all five or six of A 1 and A 2 are thiophene-2,5-diyl, or two of A 1 and A 2 are 1,4-phenylene and two of A 1 and A 2 are thiophene-2,5-diyl, wherein all thiophene and phenylene groups are optionally substituted with one or more R 1 groups, and b) A 1 and A 2 are different from wherein R 2 is R 1 or —C≡C—R 1 and the groups R 1 have independently of each other one of the meanings of R given above.