Patent ID: 7935960

Claim:
A polyacene compound selected from the following formulae wherein R 1a , R 2a , R 3a , R 4a , R 8a and R 9a each independently denote, 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, or carbyl or hydrocarbyl with 1 to 40 C atoms that is optionally substituted and optionally comprises one or more hetero atoms, wherein at least two groups R 1a , R 2a , R 3a , R 4a , R 8a or R 9a that are present in the compound are different from H, X is halogen, 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 1a , R 2a , R 3a , R 4a , R 8a or R 9a , which are located on adjacent ring positions of the polyacene, 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 —O—, —S— and —N(R 0 )—, and is optionally substituted by one or more identical or different groups R 1a , R 2a , R 3a , R 4a , R 8a or R 9a , optionally one or more of the carbon atoms in the rings formed by R 1a , R 2a , R 3a , R 4a , R 8a or R 9a are replaced by a heteroatom selected from N, P, As, O, S, Se and Te, wherein the compound does not have a symmetry axis or symmetry plane perpendicular to its long molecular axis, R 5a , R 6a , R 11a and R 12a denote —C≡C-MR′R″R′″ or —C≡C-MR′R″″ M is Si or Ge, R′, R″ and R′″ are each independently H, a C 1 -C 40 -alkyl group, a C 6 -C 40 -aryl group, a C 6 -C 40 -arylalkyl group, a C 1 -C 40 -alkoxy group, or a C 6 -C 40 -arylalkyloxy group, R″″ forms a cyclic silyl alkyl group together with the M atom, wherein all these groups are optionally substituted, and R 13a and R 14a denote a C 1 -C 40 -alkyl group that is optionally substituted.