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1. A compound of the formula (1), where the following applies to the symbols and indices used:
Ar1 and Ar2 is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R; Ar1 and Ar2 here may also be connected to one another by a single bond and thus form a carbazole;Ar3 and Ar4 is on each occurrence, identically or differently, a divalent aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which is optionally substituted by one or more radicals R, with the proviso that Ar3 and Ar4 do not contain any aryl groups having more than two aromatic six-membered rings condensed directly onto one another;Ar5 is selected from a group of formulae (3), (4), or (6), Ar6 is selected from any one group of formulae (3) to (15), where the dashed bond indicates the position of the bond from the group to the nitrogen;L is a divalent straight-chain alkylene, alkylidene, alkyleneoxy or thioalkyleneoxy group having 1 to 40 C atoms or a branched or cyclic alkylene, alkylidene, alkyleneoxy or thioalkyleneoxy group having 3 to 40 C atoms, which is optionally substituted in each case by one or more radicals R, where one or more CH2 groups, is optionally replaced by Si(R)2, Ge(R)2, Sn(R)2, C═O, C═S, C═Se, C═NR, P(═O)R, S═O, SO2, —O—, —S— or —CONR— and where one or more H atoms is optionally replaced by D, F, Cl, Br, I, CN or NO2, or a divalent aromatic ring system having 5 to 30 aromatic ring atoms, which is optionally substituted by one or more radicals R, where L does not contain any aryl groups having more than two sequentially condensed aromatic six-membered rings, or L is Si(R)2, Ge(R)2, O, S, C(═O), S(═O), SO2, SF4, PR, P(═O)(R), PF3, P(═S)(R), AsR, As(═O)(R), As(═S)(R), Sb, Sb(═O)(R), Sb(═S)(R), N(Ar) or L is a combination of two, three, four or five of these systems;R is on each occurrence, identically or differently, a H, D, F, Cl, Br, I, CN, NO2, N(Ar)2, N(R1)2, C(═O)Ar, C(═O)R1, P(═O)(Ar)2, B(R1)2, B(OR1)2, Si(R1)3, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 C atoms or an alkenyl or alkynyl group having 2 to 40 C atoms, each of which is optionally substituted by one or more radicals R1, where one or more non-adjacent CH2 groups is optionally replaced by R1C═CR1, C≡C, Si(R1)2, Ge(R1)2, Sn(R1)2, C═O, C═S, C═Se, C═NR1, P(═O)(R1), SO, SO2, NR1, O, S or CONR1 and where one or more H atoms is optionally replaced by D, F, Cl, Br, I, CN or NO2, 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, an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R1, or an aralkyl or heteroaralkyl group having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R1, where two or more adjacent substituents R may optionally form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system, which is optionally substituted by one or more radicals R1;R1 is on each occurrence, identically or differently, a H, D, F, Cl, Br, I, CN, NO2, N(Ar)2, N(R2)2, C(═O)Ar, C(═O)R2, P(═O)(Ar)2, B(R2)2, B(OR2)2, Si(R2)3, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 C atoms or an alkenyl or alkynyl group having 2 to 40 C atoms, each of which is optionally substituted by one or more radicals R2, where one or more non-adjacent CH2 groups 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 where one or more H atoms is optionally replaced by D, F, Cl, Br, I, CN or NO2, 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, an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R2, or an aralkyl or heteroaralkyl group having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R2, where two or more adjacent substituents R1 may optionally form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system, which is optionally substituted by one or more radicals R2;Ar is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system having 5-30 aromatic ring atoms, which is optionally substituted by one or more non-aromatic radicals R2; two radicals Ar which are bonded to the same N atom or P atom may also be bridged to one another by a single bond or a bridge selected from N(R2), C(R2)2, O or S;R2 is a H, D, F, CN, an aliphatic hydrocarbon radical having 1 to 20 C atoms, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, in which one or more H atoms is optionally replaced by D, F, Cl, Br, I or CN, where two or more adjacent substituents R2 may form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system with one another;m and n are on each occurrence, identically or differently, 0 or 1, where m=n=1 if L stands for O, S or N(Ar). |
