Compounds of the formula, where the following applies to the symbols and indices used: Ar 1 is on each occurrence, identically or differently, a condensed aryl or heteroaryl group selected from the group consisting of anthracene, phenanthrene, pyrene, naphthacene, chrysene, pentacene and perylene, which may be substituted by R; X is on each occurrence, identically or differently, a group of one of the formulae to where the phenyl or naphthyl or anthryl unit may in each case also be substituted by R; the dashed bond here denotes the link to the unit Ar 1; Y is on each occurrence, identically or differently, X, a group Ar 3 or a group N(Ar 3) 2, where the two radicals Ar 3 may also be connected to one another by a single bond or a group O, S, N or C 2; Ar 3 is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system, which may be substituted by one or more radicals R; Q is on each occurrence, identically or differently, a linear, branched or cyclic alkylene or alkylidene group; Q here contains 1 to 20 C atoms and may be substituted by R 1, and one or more non-adjacent C atoms may also be replaced by N-R 1, O, S, O-CO-O, CO-O, -CR 1 =CR 1 - or -C≡C-, and one or more H atoms may be replaced by F, Cl, Br, I or CN; R is on each occurrence, identically or differently, H, F, Cl, Br, I, CN, a straight-chain alkyl or alkoxy chain having 1 to 40 C atoms or a branched or cyclic alkyl or alkoxy group having 3 to 40 C atoms, which may in each case be substituted by R 1, in which, in addition, one or more non-adjacent C atoms may be replaced by N-R 1, O, S, O-CO-O, CO-O or -C≡C- and in which, in addition, one or more H atoms may be replaced by F, Cl, Br, I or CN, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which may also be substituted by one or more radicals R 1, or a combination of two, three or four of these systems; two or more radicals R here may also form a further mono- or polycyclic, aliphatic or aromatic ring system with one another; R 1 is on each occurrence, identically or differently, H or a hydrocarbon radical having 1 to 20 C atoms, which may be aliphatic or aromatic or a combination of aliphatic and aromatic and in which, in addition, one or more H atoms may be replaced by F; m is on each occurrence 0 or 1; p is on each occurrence 0 or 1. Ar 1 is on each occurrence, identically or differently, a condensed aryl or heteroaryl group selected from the group consisting of anthracene, phenanthrene, pyrene, naphthacene, chrysene, pentacene and perylene, which may be substituted by R; X is on each occurrence, identically or differently, a group of one of the formulae to where the phenyl or naphthyl or anthryl unit may in each case also be substituted by R; the dashed bond here denotes the link to the unit Ar 1; Y is on each occurrence, identically or differently, X, a group Ar 3 or a group N(Ar 3) 2, where the two radicals Ar 3 may also be connected to one another by a single bond or a group O, S, N or C 2; Ar 3 is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system, which may be substituted by one or more radicals R; Q is on each occurrence, identically or differently, a linear, branched or cyclic alkylene or alkylidene group; Q here contains 1 to 20 C atoms and may be substituted by R 1, and one or more non-adjacent C atoms may also be replaced by N-R 1, O, S, O-CO-O, CO-O, -CR 1 =CR 1 - or -C≡C-, and one or more H atoms may be replaced by F, Cl, Br, I or CN; R is on each occurrence, identically or differently, H, F, Cl, Br, I, CN, a straight-chain alkyl or alkoxy chain having 1 to 40 C atoms or a branched or cyclic alkyl or alkoxy group having 3 to 40 C atoms, which may in each case be substituted by R 1, in which, in addition, one or more non-adjacent C atoms may be replaced by N-R 1, O, S, O-CO-O, CO-O or -C≡C- and in which, in addition, one or more H atoms may be replaced by F, Cl, Br, I or CN, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which may also be substituted by one or more radicals R 1, or a combination of two, three or four of these systems; two or more radicals R here may also form a further mono- or polycyclic, aliphatic or aromatic ring system with one another; R 1 is on each occurrence, identically or differently, H or a hydrocarbon radical having 1 to 20 C atoms, which may be aliphatic or aromatic or a combination of aliphatic and aromatic and in which, in addition, one or more H atoms may be replaced by F; m is on each occurrence 0 or 1; p is on each occurrence 0 or 1.