An organic molecule having two units of formula I linked to one another via a single bond or a bridge Y,
- where
- Y=a divalent chemical group;
- X=at each occurrence independently of one another is selected from the group consisting of CN and CF3;
- D=a chemical unit having a structure of the formula I-1:
- wherein
- #=is an attachment point of the unit of formula I-1 to the structure of formula I;
- A and B=independently of one another are selected from the group consisting of CRR1, CR, NR, and N, with there being a single or double bond between A and B and a single or double bond between B and Z;
- Z=a direct bond or a divalent organic bridge which is a substituted or unsubstituted C1-C9-alkylene, C2-C8-alkenylene, C2-C8-alkynylene or arylene group or a combination thereof, —CRR1, —C═CRR1, —C═NR, —NR—, —O—, —SiRR1—, —S—, —S(O)—, —S(O)2—, O-interrupted substituted or unsubstituted C1-C9-alkylene, C2-C8-alkenylene, C2-C8-alkynylene or arylene group, phenyl units or substituted phenyl units;
- where each R and R1 are identical or different at each occurrence and are H, deuterium, azide (N3−), F, Cl, Br, I, N(R2)2, CN, CF3, NO2, OH, COOH, COOR2, CO(NR2)2, Si(R2)3, B(OR2)2, C(═O)R2, P(═O)(R2)2, S(═O)R2, S(═O)2R2, OSO2R2, a linear alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a linear alkenyl or alkynyl group having 2 to 40 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, which in each case may be substituted by one or more radicals R2, it being possible for one or more non-adjacent CH2 groups to be replaced by R2C═CR2, 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 it being possible for one or more H atoms to be replaced by deuterium, F, Cl, Br, I, CN, CF3 or NO2, or is an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms wherein this ring system is optionally substituted in each case by one or more radicals R2, or is an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, wherein this ring system is optionally substituted by one or more radicals R2, or is a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms wherein this ring system is optionally substituted by one or more radicals R2, or is a combination of these systems, or is a crosslinkable unit QE which may be crosslinked by acid-catalytic, thermal or UV crosslinking methods in the presence or absence of a photoinitiator or by microwave radiation;
- optionally two or more of these substituents R and R1 may form with one another a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system;
- R2, identically or differently at each occurrence, is H, deuterium, F, Cl, Br, I, N(R3)2, CN, CF3, NO2, OH, COOH, COOR3, CO(NR3)2, Si(R3)3, B(OR3)2, C(═O)R3, P(═O)(R3)2, S(═O)R3, S(═O)2R3, OSO2R3, a linear alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a linear alkenyl or alkynyl group having 2 to 40 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, which may be substituted in each case by one or more radicals R3, it being possible for one or more non-adjacent CH2 groups to be replaced by R3C═CR3, Si(R3)2, Ge(R3)2, Sn(R3)2, C═O, C═S, C═Se, C═NR3, P(═O)(R3), SO, SO2, NR3, O, S or CONR3, and it being possible for one or more H atoms to be replaced by deuterium, F, Cl, Br, I, CN, CF3 or NO2, or is an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms wherein this ring system is optionally substituted in each case by one or more radicals R3, or is an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms wherein this ring system is optionally substituted by one or more radicals R3, or is a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms wherein this ring system is optionally substituted by one or more radicals R3, or is a combination of these systems;
- where optionally two or more of these substituents R2 form with one another a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system;
- R3, identically or differently at each occurrence, is H, deuterium, F, CF3 or an aliphatic, aromatic and/or heteroaromatic hydrocarbon radical having 1 to 20 C atoms, in which also one or more H atoms may be replaced by F or CF3;
- where optionally two or more substituents R3 form with one another a mono- or polycyclic, aliphatic ring system;
- R′=attachment position for the second unit of the formula I or selected from the group consisting of Y, H, N(R4)2, OR4, a linear alkyl or alkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl or alkoxy group having 3 to 40 carbon atoms wherein this system is optionally substituted in each case by one or more radicals R4, and an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms wherein this ring system is optionally substituted in each case by one or more radicals R4;
- R″=attachment position for the second unit of the formula I or selected from the group consisting of Y, N(R4)2, OR4, a linear alkyl or alkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl or alkoxy group having 3 to 40 carbon atoms wherein this group is optionally substituted in each case by one or more radicals R4, and an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms wherein this ring system is optionally substituted in each case by one or more radicals R4;
- with the proviso that if R′ is Y, R″ is not Y, and, if R″ is Y, R′ is not Y;
- and with the proviso that if R′ is the attachment position for the second unit of the formula I, R″ is not the attachment position for the second unit of the formula I, and, if R″ is the attachment position for the second unit of the formula I, R′ is not the attachment position for the second unit of the formula I;
- R4, identically or differently at each occurrence, is H, deuterium, N(R5)2, Si(R5)3, a linear alkyl, alkoxy or thioalkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 carbon atoms wherein this group is optionally substituted in each case by one or more radicals R5, or is an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms wherein this ring system is optionally substituted in each case by one or more radicals R5, or is an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms wherein this group is optionally substituted by one or more radicals R5, or is a diarylamino group, diheteroarylamino group or arylheteroarylamino group having 10 to 40 aromatic ring atoms wherein this ring system is optionally substituted by one or more radicals R5, or is a combination of these systems;
- where optionally two or more of these substituents R5 may also form with one another a mono- or polycyclic, aliphatic, aromatic and/or benzo-fused ring system;
- and
- R5, identically or differently at each occurrence, is H, deuterium or an aliphatic, aromatic and/or heteroaromatic hydrocarbon radical having 1 to 20 C atoms;
- where optionally two or more substituents R5 form with one another a mono- or polycyclic, aliphatic ring system.