Patent ID: 7786332

Claim:
A ring compound of formula XIII: wherein m and n are each 1, Y is a group of formula XIV wherein one or two CH groups in the aromatic ring systems may be replaced by N, X is L, independently of one another, are identical or different and are each R, F, Cl, Br, I, OH, OR, SH, SR, CN, NO 2 , NO, COOH, COOR, CONH 2 , CONHR, CONR 2 , CF 3 , NH 2 , NHR or NR 2 , R is an alkyl, alkenyl or acyl group having from 1 to 12 carbon atoms or an aryl group having 6 carbon atoms, which is optionally substituted by an alkyl group having from 1 to 12 carbon atoms, a, b, c, d, and f, independently of one another, are identical or different and are each 0, 1 or 2, and the sum (a+b+c+d+f) is 1 to 8, and R 1 and R 2 , independently of one another, are identical or different and are each H, F, Cl, CN, NCS, a straight-chain or branched, optionally chiral, alkyl radical or alkoxy radical having from 1 to 12 carbon atoms or an alkenyl radical or alkynyl radical having from 2 to 8 carbon atoms, in each of which, in addition, one CH 2 group may be replaced by —O—, —CO—, —O—CO—, —COO— or —CH═CH— in such a way that heteroatoms are not linked directly to one another and/or one or more H may be replaced by halogen, wherein at least one of R 1 and R 2 is not H.