Patent ID: 7959990

Claim:
Compounds according to the general formula (I): wherein A and B each independently are a ring system of 5 to 40 atoms, wherein each ring system includes at least one unsaturation directly connected via electron conjugation (π-π bonding) to the double bond shown in formula (I), wherein the ring system may be unsubstituted or mono- or poly-substituted by (i) a halogen atom, (ii) a hydroxyl group and/or (iii) a polar group like nitro, nitrile or a carboxy group, and/or (iv) a cyclic, straight-chain or branched alkyl residue having from 1 to 30 carbon atoms, which is unsubstituted, mono- or poly-substituted by methyl, fluorine and/or chlorine, wherein one or more, preferably non-adjacent —CH 2 — groups independently may be replaced by a group selected from —O—, —CO— —CO—O—, —O—CO—, —NR 1 —, —NR 1 —CO—, —CO—NR 1 —, —NR 1 —CO—O—, —O—CO—NR 1 —, —NR 1 —CO—NR 1 —, —CH═CH—, —C≡C— and —Si(CH 3 ) 2 —O—Si(CH 3 ) 2 —, an aromatic or an alicyclic group, wherein R 1 is a hydrogen atom or lower alkyl; and/or (v) an acryloyloxy, alkoxy, alkylcarbonyloxy, alkyloxocarbonyloxy, methacryloyloxy, vinyl, allyl, vinyloxy and/or allyloxy group, having from 1 to 20 carbon atoms, preferably having from 1 to 10 carbon atoms, S 1 is a single covalent bond or a spacer unit; n is 1, 2 or 3; X and Y represent groups of which one is a hydrogen atom and the other is an electron withdrawing group, which preferably is selected from the groups —COR 2 , —COOR 2 , —COSR 2 , —CO—NR 2 , —SOR 2 , —SOCF 3 , —SO 2 CF 2 COR 2 , —SOOR 2 , —C≡S, —NO 2 , —CF 3 , —CN, wherein R 2 is a hydrogen atom or a straight-chain or branched alkyl or alkylene group, having from 1 to 16 carbon atoms, wherein one or more, preferably non-adjacent —CH 2 — groups independently may be replaced by a group, selected from —O—, —CO—, —CO—O—, —O—CO—, —C═C—, —C≡C—, or by an optionally substituted alkyl, or by a polymerizable group, G is a hydrogen atom, optionally substituted alkyl, or a polymerizable group with the proviso, that when Y is —CN and A is unsubstituted phenylene, then B may not be phenylene para-substituted by —CN, —NO 2 or —COOH; and with the proviso that if ring system A is 1,4-phenylene, which is unsubstituted or substituted with halogen, cyano and/or nitro, and ring system B is 1,4-phenylene, which is unsubstituted or substituted with halogen, cyano and/or nitro, or pyrimidine-2,5-diyl, pyridine-2,5-diyl, 2,5-thiophenylenediyl, 2,5-furanylene, 1,4-naphthylene or 2,6-naphthylene, then X is different from —CN and —COO-alkyl having from 1 to 12 carbon atoms.