Materials for organic electroluminescent devices

A compound of the formula (1),

• where the following applies to the symbols and indices used:
• Ar1 stands on each occurrence, identically or differently, for 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;
• Ar2 stands on each occurrence, identically or differently, for 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;
• Ar3 stands on each occurrence, identically or differently, for 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 R3;
• -E- is a single bond, —B(R0)—, —C(R0)2—, —Si(R0)2—, —C(═O)—, —C(═NR0)—, —C(═C(R0)2)—, —O—, —S—, —S(═O)—, —S(O2)—, —N(R0)—, —P(R0)— or —P((═O)R0)—;
• R0, R1, R2, R3 stand on each occurrence, identically or differently, for H, D, F, Cl, Br, I, CHO, CN, N(Ar)2, C(═O)Ar, P(═O)(Ar)2, S(═O)Ar, S(═O)2Ar, NO2, Si(R)3, B(OR)2, OSO2R, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or branched or a cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 C atoms, each of which may be substituted by one or more radicals R, where in each case one or more non-adjacent CH2 groups may be replaced by RC═CR, C≡C, Si(R)2, Ge(R)2, Sn(R)2, C═O, C═S, C═Se, P(═O)(R), SO, SO2, O, S or CONR and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, an aromatic or heteroaromatic ring systems having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R, or an aryloxy group having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R, where two radicals R0, two radicals R1, two radicals R2 and/or two radicals R3 may form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system with one another, which may be substituted by one or more radicals R;
• R stands on each occurrence, identically or differently, for H, D, F, Cl, Br, I, CHO, CN, N(Ar)2, C(═O)Ar, P(═O)(Ar)2, S(═O)Ar, S(═O)2Ar, NO2, Si(R′)3, B(OR′)2, OSO2R′, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 C atoms, each of which may be substituted by one or more radicals R′, where in each case one or more non-adjacent CH2 groups may be replaced by R′C═CR′, C≡C, Si(R′)2, Ge(R′)2, Sn(R′)2, C═O, C═S, C═Se, P(═O)(R′), SO, SO2, O, S or CONR and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, an aromatic or heteroaromatic ring systems having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R, or an aryloxy group having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R′, where two radicals R may form a ring system with one another, which may be substituted by one or more radicals R′;
• Ar is an aromatic or heteroaromatic ring system having 5 to 24 aromatic ring atoms, which may in each case also be substituted by one or more radicals R;
• R′ stands on each occurrence, identically or differently, for H, D, F, Cl, Br, I, CN, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 20 C atoms or branched or cyclic alkyl, alkoxy or thioalkyl group having 3 to 20 C atoms, where in each case one or more non-adjacent CH2 groups may be replaced by SO, SO2, O, S and where one or more H atoms may be replaced by D, F, Cl, Br or I, or an aromatic or heteroaromatic ring system having 5 to 24 C atoms;
• n is 0 or 1;
• wherein when n is 0, the group -E- is absent;
• wherein the compound of formula (1) comprise at least one group Ar3, R1, R2 or R3, which stand for a triphenylene derivative of the formula (T),
• where the dashed bond indicates the bonding to the structure of formula (1), and where:
• R4 is C at the position of the bonding to ArS or, R4 is C at the position of the bonding to the structure of formula (1) if m is 0;
• and at other positions, R4 stands on each occurrence, identically or differently, for H, D, F, Cl, Br, I, CHO, CN, N(Ar)2, C(═O)Ar, P(═O)(Ar)2, S(═O)Ar, S(═O)2Ar, NO2, Si(R)3, B(OR)2, OSO2R, a straight-chain alkyl, alkoxy or thioalkyl group having 1 to 40 C atoms or branched or a cyclic alkyl, alkoxy or thioalkyl group having 3 to 40 C atoms, each of which may be substituted by one or more radicals R, where in each case one or more non-adjacent CH2 groups may be replaced by RC═CR, C≡C, Si(R)2, Ge(R)2, Sn(R)2, C═0, C═S, C═Se, P(═O)(R), SO, SO2, O, S or CONR and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, an aromatic or heteroaromatic ring systems having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R, or an aryloxy group having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R, where two radicals R4 may form a monocyclic or polycyclic, aliphatic, aromatic or heteroaromatic ring system, which may be substituted by one or more radicals R;
• ArS is an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which may in each case also be substituted by one or more radicals R;
• and
• m is an integer selected from 0, 1, 2, 3 or 4;
• and
• where the following compounds are excluded: