Materials for organic electroluminescence devices

A mixture comprising at least one compound of the Formula (I) and one or more dopants;

• wherein
• Ar1 is, identically or differently on each
• occurrence, a fused aryl or heteroaryl group having at least 14 aromatic ring atoms optionally substituted by one or more R;
• X is, identically or differently on each occurrence, a group of formula (2) or (3)
• wherein the dashed bond is a link from Ar2 or Q to Ar1;
• Y is, identically or differently on each occurrence, X;
• an Ar3 group;
• or an N(Ar3)2 group, wherein the two Ar3 radicals are optionally bonded to one another by a single bond or via an O, S, N(R), or C(R)2 group;
• Ar2 is, identically or differently on each occurrence, an aryl or heteroaryl group optionally substituted by one or more R and to which a group Q is bonded, with the proviso that either the group Q or an R other than H is bonded in the orthoposition to the Ar1—Ar2 bond;
• Ar3 is, identically or differently on each occurrence, an aromatic or heteroaromatic ring system optionally substituted by one or more R;
• Q is, identically or differently on each occurrence, a linear, branched, or cyclic alkylene or alkylidene group which forms two bonds to Ar2 or one bond to Ar1 and one bond to Ar2 and thereby defining a further ring system;
• wherein Q has up to 20 C atoms optionally substituted by R1, wherein one or more non-adjacent C atoms are optionally replaced by N—R1, O, S, O—OO—O, CO—O, —CR1═CR1—, or—C≡C—, and one or more H atoms are optionally replaced by F, Cl, Br, I, or CN,
• wherein Q is bonded to the ortho-position of Ar2, where said ortho-position is relative to the link between Ar2 and Ar1;
• R is, identically or differently on each occurrence, H, F, Cl, Br, I, CN, a straight-chain alkyl or alkoxy chain having up to 40 C atoms, or a branched or cyclic alkyl or alkoxy group having 3 to 40 C atoms, wherein said straight-chain alkyl or alkoxy chain or said branched or cyclic alkyl or alkoxy group are optionally substituted by R1, wherein one or more non-adjacent C atoms are optionally replaced by N—R1, O, S, O—CO—O, CO—O, —CR1═CR1—, or —C≡C—, and wherein one or more H atoms are optionally replaced by F, Cl, Br, I, CN, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms optionally substituted by one or more R1, or a combination of two, three or four of these systems;
• and wherein two or more R here optionally define a further mono- or polycyclic, aliphatic, or aromatic ring system with one another;
• R1is, identically or differently on each occurrence, H or a hydrocarbon radical having up to 20 C atoms, wherein said hydrocarbon radical is optionally aliphatic or aromatic or a combination of aliphatic and aromatic, and wherein one or more H atoms are optionally replaced by F;
• m is, on each occurrence, 0 or 1;
• p is, on each occurrence, 0, 1, or 2;
• with the proviso that the following compound is excluded as a compound of formula (1):