Metal Complexes

A compound of formula (1):

• [Ir(L)n(L′)m] (1)
• comprising a moiety Ir(L)n of formula (2):
• wherein
• X is on each occurrence, identically or differently, CR or N, with the proviso that a maximum of two X per ligand is N;
• Y is on each occurrence, identically or differently, CR or N, with the proviso that a maximum of one Y is N, or wherein the two Y together are a group of formula (3):
• wherein the dashed bonds denote the linking of this group in the ligand;
• R is on each occurrence, identically or differently, H, D, F, Cl, Br, I, N(R1)2, CN, Si(R1)3, B(OR1)2, C(═O)R1, 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 is optionally substituted by one or more radicals R1, wherein one or more non-adjacent CH2 groups are optionally replaced by R1C═CR1, Si(R1)2, C═O, NR1, O, S, or CONR1, and wherein one or more H atoms are optionally replaced by D, F, or CN, an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms optionally substituted by one or more radicals R1, an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms optionally substituted by one or more radicals R1, or a diarylamino group, diheteroarylamino group, or arylheteroarylamino group having 10 to 40 aromatic ring atoms optionally substituted by one or more radicals R1;
• and wherein two or more adjacent radicals R optionally define a mono- or polycyclic, aliphatic, aromatic, and/or benzo-fused ring system with one another;
• R1 is on each occurrence, identically or differently, H, D, F, N(R2)2, CN, Si(R2)3, B(OR2)2, C(═O)R2, 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 is optionally substituted by one or more radicals R2, wherein one or more non-adjacent CH2 groups are optionally replaced by R2C═CR2, Si(R2)2, C═O, NR2, O, S, or CONR2, and wherein one or more H atoms are optionally replaced by D, F, or CN, 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, or a diarylamino group, diheteroarylamino group, or arylheteroarylamino group having 10 to 40 aromatic ring atoms optionally substituted by one or more radicals R2;
• and wherein two or more adjacent radicals R1 optionally define a mono- or polycyclic, aliphatic ring system with one another;
• R2 is on each occurrence, identically or differently, H, D, F, or an aliphatic, aromatic and/or heteroaromatic organic radical having 1 to 20 C atoms, wherein one or more H atoms are optionally replaced by D or F;
• and wherein two or more substituents R2 optionally define a mono- or polycyclic, aliphatic or aromatic ring system with one another;
• L′ is, identically or differently on each occurrence, a monoanionic bidentate ligand which is different from L and whose coordinating atoms are selected, identically or differently on each occurrence, from the group consisting of C, N, O, and S;
• n is 1 or 2;
• m is 1 or 2;
• wherein n+m=3.