Patent ID: 7700643

Claim:
A compound of formula I R 3 -(A) a -(B) b -(C) c -(D) d -(E) e -R 4 wherein A, B, C, D and E are independently of each other a TT group of formula II or are selected from phenylene-1,4-diyl that is optionally substituted by one or two R 1 groups that are different than H, thiophene-2,5-diyl that is optionally substituted by one or two R 1 groups that are different than H, selenophene-2,5-diyl that is optionally substituted by one or two R 1 groups that are different than H, and naphthalene-2,6-diyl that is optionally substituted by one or two R 1 groups that are different than H, R 1 and R 2 independently of each other are each H, halogen, P-Sp-, P*-Sp, or straight chain, branched or cyclic alkyl with 1 to 20 C-atoms, which may be unsubstituted, mono- or polysubstituted by F, Cl, Br, I or CN, and wherein one or more non-adjacent CH 2 groups are each independently optionally replaced by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, —OCO—, —O—CO—O—, —S—CO—, —CO—S—, —CX 1 ═CX 2 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, R 3 and R 4 are independently of each other P-Sp-, P*-Sp-, H, halogen, or straight chain, branched or cyclic alkyl with 1 to 20 C-atoms, which may be unsubstituted, mono- or polysubstituted by F, Cl, Br, I or CN, and wherein one or more non-adjacent CH 2 groups are each independently optionally replaced by —O—, —S—, —NH—, —NR 0 —, —SiR 0 R 00 —, —CO—, —COO—, —OCO—, —O—CO—O—, —S—CO—, —CO—S—, —CX 1 ═CX 2 — or —C≡C— in such a manner that O and/or S atoms are not linked directly to one another, with at least one of R 3 and R 4 being P-Sp- or P*Sp—, X 1 and X 2 are independently of each other H, F, Cl or CN, P is CH 2 ═CH—COO—, CH 2 ═C(CH 3 )—COO—, CH 2 ═CH—, CH 2 ═CH—O—, (CH 2 ═CH) 2 CH—OCO—, (CH 2 ═CH) 2 CH—O—, k 1 is 0 or 1, P* is —OH or —O—Si—R 0 R 00 R 000 , Sp is a spacer group or a single bond, R 0 , R 00 and R 000 are independently of each other H, alkyl with 1 to 12 C-atoms or aryl, and a, b, c and d are independently of each other 0, 1, 2 or 3, with a+b+c+d >0; wherein the compound comprises two or three TT groups, or the compound comprises one, two or three TT groups and one, two, three or four groups selected from phenylene-1,4-diyl, thiophene-2,5-diyl, selenophene-2,5-diyl, and naphthalene-2,6-diyl which in each case is optionally substituted by one or two R 1 groups that are different than H.