Patent ID: 7985353

Claim:
A compound of formula I wherein a is 1, b is 1, n is an integer ≧2, R 1-14 denote, in case of multiple occurrence independently of one another, identical or different groups selected from the group consisting of H, halogen, —CN, —NC, —NCO, —NCS, —OCN, —SCN, —C(═O)NR 0 R 00 , —C(═O)X, —C(═O)R 0 , —NH 2 , —NR 0 R 00 , —SH, —SR 0 , —SO 3 H, —SO 2 R 0 , —OH, —NO 2 , —CF 3 , —SF 5 , optionally substituted silyl, and carbyl and hydrocarbyl with 1 to 40 C atoms that is optionally substituted and optionally comprises one or more hetero atoms, R 1-4 and R 8-11 can also denote a linkage to an adjacent polyacene unit, wherein said linkage is a single bond or optionally contains a spacer group, X is halogen, and R 0 and R 00 are independently of each other H or an optionally substituted carbyl or hydrocarbyl group optionally comprising one or more hetero atoms, optionally two or more of the substituents R 1 -R 14 which are located on adjacent ring positions of the polyacene or which are located on adjacent polyacene units, constitute a further saturated, unsaturated or aromatic ring system having 4 to 40 C atoms, which is monocyclic or polycyclic, is fused to the polyacene, is optionally intervened by one or more groups selected from the group consisting of —O—, —S—, ═N— and —N(R 0 )—, and is optionally substituted by one or more identical or different groups R 1 , optionally one or more of the carbon atoms in the polyacene skeleton or in the rings formed by R 1-14 are replaced by a heteroatom selected from the group consisting of N, P, As, O, S, Se and Te, wherein the n polyacene units are identical or different from each other, and a polyacene unit is linked to its adjacent polyacene unit(s) via one of R 1-4 and/or one of R 8-11 , and/or a polyacene unit is optionally fused to its adjacent polyacene unit(s) via two of R 1-4 and/or two of R 8-11 .