Fluorine derivatives for organic electroluminescence devices

A compound of formula (1)

• wherein
• X is on each occurrence, identically or differently, CR1 or N, wherein a maximum of 3 X groups in each ring are N or wherein two directly adjacent X groups are a unit of formula (7)
• wherein the dashed bonds indicate the link of the unit of formula (7) to adjacent C or N atoms;
• Y is on each occurrence, identically or differently, a single bond or BR1, C(R1)2, C(═O), C(═NR1), C(═C(R1)2), Si(R1)2, P(═O)R1, O, S, S(═O), S(═O)2, C(R1)2—C(R1)2, C(R1)2—NR1, or CR1═CR1;
• is on each occurrence, identically or differently, CR1 or N, wherein a maximum of two Z in each ring are N;
• R is on each occurrence, identically or differently, NAr2, C(═O)Ar, P(═O)Ar2, or an aromatic or heteroaromatic ring system having from 5 to 30 aromatic ring atoms and is optionally substituted by one or more non-aromatic radicals R1;
• Ar is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system having from 5 to 30 aromatic ring atoms and is optionally substituted by one or more non-aromatic radicals R1;
• wherein two Ar bonded to the same nitrogen or phosphorus atom are optionally linked to one another by a single bond or a bridge selected from the group consisting of B(R2), C(R2)2, Si(R2)2, C═O, C═NR2, C═C(R2)2, O, S, S═O, SO2, N(R2), P(R2), and P(═O)R2;
• R1 is on each occurrence, identically or differently, H, F, Cl, Br, I, CHO, N(R2)2, N(Ar)2, C(═O)Ar, P(═O)(Ar)2, S(═O)Ar, S(═O)2Ar, CR2═CR2Ar, CN, NO2, Si(R2)3, B(OR2)2, B(R2)2, B(N(R2)2)2, OSO2R2, a straight-chain alkyl, alkenyl, alkynyl, alkoxy, or thioalkoxy group having from 1 to 40 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy, or thioalkoxy group having from 3 to 40 C atoms, wherein said straight-chain, branched, or cyclic alkyl, alkenyl, alkynyl, alkoxy, or thioalkoxy group is optionally substituted by one or more radicals R2, wherein one or more non-adjacent CH2 groups in said straight-chain, branched, or cyclic alkyl, alkenyl, alkynyl, alkoxy, or thioalkoxy group 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 wherein one or more H atoms in said straight-chain, branched, or cyclic alkyl, alkenyl, alkynyl, alkoxy, or thio-alkoxy group is optionally replaced by F, Cl, Br, I, CN, or NO2, an aromatic or heteroaromatic ring system having from 5 to 60 aromatic ring atoms and is optionally substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group haying from 5 to 60 aromatic ring atoms and is optionally substituted by one or more radicals R2, or a combination of these systems;
• and wherein two or more adjacent substituents R1 optionally define a mono- or polycyclic, aliphatic or aromatic ring system with one another;
• R2 is on each occurrence, identically or differently, H, D, or an aliphatic, aromatic, and/or heteroaromatic hydrocarbon radical having from 1 to 20 C atoms, wherein H atoms of said aliphatic, aromatic, and/or heteroaromatic hydrocarbon radical is optionally replaced by F;
• and wherein two or more adjacent substituents R2 optionally define a mono- or polycyclic, aliphatic, or aromatic ring system with one another;
• n is 1 or 2;
• and
• with the proviso that said compound of formula (1) does not include the following compound: