Electronic device comprising metal complexes

A compound represented by at least one of formulae (4) to (7) or (6a):

• wherein
• Z is, identically or differently on each occurrence, C, CR1, N, or P;
• E is, identically or differently on each occurrence, C or N;
• D is, identically or differently on each occurrence, C or N;
• R is, identically or differently on each occurrence, H, deuterium, F, Cl, Br, I, N(R2)2, CN, NO2, Si(R2)3, B(OR2)2, C(═O)R2, P(═O)(R2)2, S(═O)R2, S(═O)2R2, OSO2R2, a straight-chain alkyl, alkoxy, or thioalkoxy group having 1 to 40 C atoms optionally substituted by one or more radicals R2, a straight-chain alkenyl or alkynyl group having 2 to 40 C atoms optionally substituted by one or more radicals R2, a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy, or thioalkoxy group having 3 to 40 C atoms optionally substituted by one or more radicals R2, wherein one or more non-adjacent CH2 groups of said straight-chain alkyl, alkoxy, thioalkoxy group, said straight-chain alkenyl or alkynyl group, and said branched or cyclic alkyl, alkenyl, alkynyl, alkoxy, or thioalkoxy group is optionally replaced by R2C═CR2, C≡C, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, C═NR2, P(═O)(R2), SO, SO2, NR2, O, S, or CONR2, and wherein one or more H atoms of said straight-chain alkyl, alkoxy, thioalkoxy group, said straight-chain alkenyl or alkynyl group, and said branched or cyclic alkyl, alkenyl, alkynyl, alkoxy, or thioalkoxy group is optionally replaced by F, Cl, Br, I, CN, or NO2, an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms optionally substituted by one or more radicals R2, an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms optionally substituted by one or more radicals R2, a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms optionally substituted by one or more radicals R2, or a combination of these systems;
• and wherein two or more R optionally define a mono- or polycyclic, aliphatic, aromatic, and/or benzo-fused ring system with one another;
• R1 is, identically or differently on each occurrence, R or a group L2;
• R2 is, identically or differently on each occurrence, H, F, or an aliphatic, aromatic, and/or heteroaromatic radical having 1 to 20 C atoms, wherein one or more H atoms is optionally replaced by F;
• and wherein two or more R2 optionally define a mono- or polycyclic, aliphatic, or aromatic ring system with one another;
• M is a transition metal, or a main-group metal from the third main group;
• Y is, identically or differently on each occurrence, an optionally substituted atom selected from C, N or P wherein the substituent, which is optionally present might also be coordinated to the metal M;
• Ar is, identically or differently on each occurrence, a group which forms an aryl or heteroaryl group having 5 to 14 aromatic ring atoms together with the group E-D-E and is optionally substituted by one or more radicals R;
• L1 is, identically or differently on each occurrence, a mono-, bi-, tri-, tetra-, penta-, or hexadentate ligand;
• L2 is, identically or differently on each occurrence, a donor group having 1 to 40 C atoms, which optionally forms a further bond or coordination to M and is optionally substituted by one or more radicals R;
• p is 0, 1, or 2;
• m is 2, 3, or 4;
• and
• n is, identically or differently on each occurrence, 0, 1, or 2, where n=0 means that the group Y is not present and a single bond is present between two groups E.