Patent ID: 8241763

Claim:
A compound of the formulas (1), (2), (3), (4), (5) or (6) where the following applies to the symbols and indices: Y is on each occurrence, identically or differently, CR 1 or N; Z is equal to C if a bridge X is bonded to the group Z and is equal to Y if no bridge X is bonded to the group Z; X is on each occurrence is differently a divalent bridge selected from the group consisting of B(R 1 ), C(R 1 ) 2 , Si(R 1 ) 2 , C═O, C═NR 1 , C═C(R 1 ) 2 , O, S, S═O, SO 2 , N(R 1 ), P(R 1 ) and P(═O)R 1 ; or X is on each occurrence is identically a divalent bridge selected from the group consisting of B(R 1 ), C(R 1 ) 2 , Si(R 1 ) 2 , C═O, C═NR 1 , C═C(R 1 ) 2 , O, S, S═O, SO 2 , P(R 1 ) and P(═O)R 1 ; R 1 is on each occurrence, identically or differently, H, F, Cl, Br, I, CHO, N(Ar) 2 , C(═O)Ar, P(═O)Ar 2 , S(═O)Ar, S(═O) 2 Ar, CR 2 ═CR 2 Ar, CN, NO 2 , Si(R 2 ) 3 , B(OR 2 ) 2 , OSO 2 R 2 , a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which is optionally substituted by one or more radicals R 2 , where one or more non-adjacent CH 2 groups is optionally replaced by R 2 C═CR 2 , C≡C, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , P(═O)(R 2 ), SO, SO 2 , NR 2 , O, S or CONR 2 and where one or more H atoms is optionally replaced by F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which may in each case be substituted by one or more radicals R 2 , or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R 2 , or a combination of these systems; two or more adjacent substituents R 1 here may also form a mono- or polycyclic ring system with one another; Ar is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which is optionally substituted by one or more non-aromatic radicals R 1 ; two radicals Ar which are bonded to the same nitrogen or phosphorus atom may also be linked to one another by a single bond or a bridge selected from B(R 2 ), C(R 2 ) 2 , Si(R 2 ) 2 , C═O, C═NR 2 , C═C(R 2 ) 2 , O, S, S═O, SO 2 , N(R 2 ), P(R 2 ) and P(═O)R 2 ; R 2 is on each occurrence, identically or differently, H or an aliphatic, aromatic and/or heteroaromatic hydrocarbon radical having 1 to 20 C atoms, in which, in addition, H atoms is optionally replaced by F; two or more adjacent substituents R 2 here optionally forms a mono- or polycyclic aliphatic or aromatic ring system with one another; a, b, c, and d is on each occurrence, identically or differently, 0 or 1, with the proviso that a+b=1 or 2 and c+d=1 or 2, where a=0 or b=0 or c=0 or d=0 in each case means that the corresponding bridge X is not present.