Materials for organic electroluminescent devices

A crosslinked compound obtained by crosslinking groups Q of a compound of the formula (2) or (3),

• where
• Ar3, Ar4, Ar5 are selected on each occurrence, identically or differently, from the group consisting of an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may be substituted by one or more radicals R;
• Q is on each occurrence, identically or differently, a crosslinkable group bonded to the adjacent phenyl group via a single bond, or Q is a crosslinkable mono- or polycyclic group condensed on the adjacent phenyl group;
• R is on each occurrence, identically or differently, H, D, F, Cl, Br, I, CHO, N(Ar)2, C(═O)Ar, P(═O)(Ar)2, S(═O)Ar, S(═O)2Ar, (R)C═C(R)Ar, CN, NO2, Si(R1)3, B(OR1)2, B(R1)2, B(N(R1)2)2, OSO2R1, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a straight-chain alkenyl or alkynyl group having 2 to 40 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which may be substituted by one or more radicals R1, where one or more, non-adjacent CH2 groups may be replaced by (R1)C═C(R1), C≡C, Si(R1)2, Ge(R1)2, Sn(R1)2, C═O, C═S, C═Se, P(═O)(R1), SO, SO2, N(R1), O, S or CON(R1) and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R1, or an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, which may be substituted by one or more radicals R1, where optionally two adjacent substituents R can form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system with one another;
• Ar is an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may be substituted by one or more radicals R1;
• R1 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, CHO, N(R2)2, C(═O)R2, P(═O)(R2)2, S(═O)R2, S(═O)2R2, (R2)C═C(R2)2, CN, NO2, Si(R2)3, B(OR2)2, B(R2)2, B(N(R2)2)2, OSO2R2, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a straight-chain alkenyl or alkynyl group having 2 to 40 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which may be substituted by one or more radicals R2, where one or more, non-adjacent CH2 groups may be replaced by (R2)C═C(R2), C≡C, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, P(═O)(R2), SO, SO2, N(R2), O, S or CON(R2) and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, which may be substituted by one or more radicals R2, where optionally two adjacent substituents R1 can form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system with one another;
• R2 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, CHO, CN, NO2, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 20 C atoms or a straightchain alkenyl or alkynyl group having 2 to 20 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 20 C atoms, or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms or an aryloxy or heteroaryloxy group having 5 to 30 aromatic ring atoms;
• where optionally two adjacent substituents R2 can form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system with one another;
• m is on each occurrence, identically or differently, 1 or 2;
• n is on each occurrence, identically or differently, 0 or 1;
• with the proviso that m+n=2 in the amino moiety comprising a group Ar3 and an aromatic or heteroaromatic ring system containing Y, and m+n=2 in the amino moiety comprising a group Ar5 and an aromatic or heteroaromatic ring system containing Y;
• p is 1;
• s is on each occurrence, identically or differently, 0, 1, 2, 3 or 4;
• and
• t is on each occurrence, identically or differently, 0, 1, 2 or 3.