Compounds with an acceptor and a donor group

Abstract

The present invention describes compounds having an acceptor group and a donor group, especially for use in electronic devices. The invention further relates to a process for preparing the compounds of the invention and to electronic devices comprising these.

1 .- 19 . (canceled) 
     
     
         20 . A compound comprising at least one structure of the formula (I): 
       
         
           
           
               
               
           
         
         where the symbols used are as follows:
 Q is an acceptor group comprising an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 1  radicals; 
 HL is a donor group; 
 Ar a , Ar b  is the same or different and is an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 1  radicals; 
 R a , R b  is the same or different and is a straight-chain 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, each of which may be substituted by one or more R 1  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 1 C═CR 1 —, —C—C—, Si(R 1 ) 2 , Ge(R 1 ) 2 , Sn(R 1 ) 2 , C═O, C═S, C═Se, C═NR 1 , NR 1 , P(═O)(R 1 ), —C(═O)O—, —C(═O)NR 1 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 1  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 1  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 1  radicals; or a combination of these systems; at the same time, the R a  and R b  together form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
 
         R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; and 
         R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system. 
       
     
     
         21 . The compound according to  claim 20 , wherein the Ar a  and/or Ar b  group in formula (I) is different from a donor group as per symbol HL. 
     
     
         22 . The compound according to  claim 20 , wherein the donor group HL comprises a group selected from the formulae (H-1) to (H-3) 
       
         
           
           
               
               
           
         
         where the dotted bond marks the attachment position and 
         Ar 2 , Ar 3 , Ar 4  are each independently an aryl group having 6 to 40 carbon atoms or a heteroaryl group having 3 to 40 carbon atoms, each of which may be substituted by one or more R radicals; 
         p is 0, 1, 2, 3, 4, 5 or 6; 
         Z is CR 1   2 , SiR 1   2 , C═O, N-Ar 1 , BR 1 , PR 1 , POR 1 , SO, SO 2 , Se, O or S; 
         R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; and 
         Ar 1  represents an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, an aryloxy group which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, or an aralkyl group which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, where it is optionally possible for two or more, R 1  substituents to form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system which may be substituted by one or more R 3  radicals. 
       
     
     
         23 . The compound according to  claim 20 , wherein the donor group HL comprises a group selected from the formulae (H-4) to (H-26) 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         wherein 
         Y 1  represents O, S, C(R 1 ) 2  or NAr 1 ; 
         the dotted bond marks the attachment position; 
         e is 0, 1 or 2; 
         j is 0, 1, 2 or 3; 
         h is 0, 1, 2, 3 or 4; 
         p is 0, 1, 2, 3, 4, 5 or 6; 
         Ar 1  represents an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, an aryloxy group which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, or an aralkyl group which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, where it is optionally possible for two or more, R 1  substituents to form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system which may be substituted by one or more R 3  radicals; 
         Ar 2  is an aryl group having 6 to 40 carbon atoms or a heteroaryl group having 3 to 40 carbon atoms, each of which may be substituted by one or more R 1  radicals; 
         R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; and 
         R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system. 
       
     
     
         24 . The compound according to  claim 22 , wherein the Ar 2  group is a connecting structure of the formula (LAr-1) 
       
         
           
           
               
               
           
         
         where X is the same or different at each instance and is N or CR 1 , or C if a group binds to X; 
         the dotted bond marks the attachment position; 
         s is 0, 1, 2, 3, 4, 5 or 6;
 R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
 R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; and 
 R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system. 
 
       
     
     
         25 . The compound according to  claim 22 , wherein the acceptor group is a group that can be represented by the formula (QL)
   Q 1 -L 1 -  Formula (QL)
   in which L 1  represents a bond or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 1  radicals;   Q 1  is an electron-withdrawing group;   R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system;   R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; and   R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system.   
     
     
         26 . The compound according to  claim 22 , wherein Ar 2  group is a connecting structure of the formula (LAr-2) 
       
         
           
           
               
               
           
         
         where X is the same or different at each instance and is N or CR 1 , or C if a group binds to X; 
         the dotted bond marks the attachment position and t is 0, 1, 2, 3, 4, 5 or 6; 
         R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; and 
         R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system. 
       
     
     
         27 . The compound according to  claim 25 , wherein the Q 1  group is selected from structures of the formulae (Q-1), (Q-2), (Q-3), (Q-4), (Q-5), (Q-6), (Q-7), (Q-8), (Q-9) and/or (Q-10) 
       
         
           
           
               
               
           
         
         where the dotted bond marks the attachment position; 
         Q′ is the same or different at each instance and represents CR 1  or N; 
         Q″ represents NR 1 , O or S; 
         where at least one Q′ is N and/or at least one Q″ is NR 1 ; 
         R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; and 
         R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system. 
       
     
     
         28 . The compound according to  claim 25 , wherein the Q 1  group is selected from structures of the formulae (Q-11), (Q-12), (Q-13), (Q-14) and/or (Q-15) 
       
         
           
           
               
               
           
         
         wherein 
         R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         X is N or CR 1  and 
         the dotted bond marks the attachment position. 
       
     
     
         29 . The compound according to  claim 25 , wherein the Q 1  group is selected from structures of the formulae (Q-26), (Q-27), (Q-28), (Q-29) and/or (Q-30) 
       
         
           
           
               
               
           
         
         wherein 
         X is N or CR 1 ; 
         R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
         the dotted bond marks the attachment position, and 
         Ar 1  represents an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, an aryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 1  radicals, or an aralkyl group which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 1  radicals, where it is optionally possible for two or more, preferably adjacent R 1  substituents to form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system which may be substituted by one or more R 2  radicals. 
       
     
     
         30 . The compound according to  claim 25 , wherein the electron-withdrawing Q 1  group is an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and has one or more electron-withdrawing substituents. 
     
     
         31 . The compound according to  claim 30 , wherein the electron-withdrawing substituent is selected from F, fluorinated alkyl groups, CF 3 , C n F 2n+1 , C(═O)OR 1 , C(═O)N(R′) 2 , NO 2 , CHO, C(═O)R 1 , S(═O)R 1 , S(═O) 2 R 1  and/or CN;
 R 1  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 2 ) 2 , CHO, C(═O)R 2 , CR 2 ═C(R 2 ) 2 , CN, C(═O)OR 2 , C(═O)N(R 2 ) 2 , Si(R 2 ) 3 , N(R 2 ) 2 , NO 2 , P(═O)(R 2 ) 2 , OSO 2 R 2 , OR 2 , S(═O)R 2 , S(═O) 2 R 2 , a straight-chain 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, each of which may be substituted by one or more R 2  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 2 C═CR 2 —, —C—C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , NR 2 , P(═O)(R 2 ), —C(═O)O—, —C(═O)NR 2 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 2  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 2  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 2  radicals; or a combination of these systems; at the same time, two or more R 1  radicals together may form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
 R 2  is the same or different at each instance and is H, D, F, Cl, Br, I, B(OR 3 ) 2 , CHO, C(═O)R 3 , CR 3 ═C(R 3 ) 2 , CN, C(═O)OR 3 , C(═O)N(R 3 ) 2 , Si(R 3 ) 3 , N(R 3 ) 2 , NO 2 , P(═O)(R 3 ) 2 , OSO 2 R 3 , OR 3 , S(═O)R 3 , S(═O) 2 R 3 , a straight-chain 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, each of which may be substituted by one or more R 3  radicals, where one or more nonadjacent CH 2  groups may be replaced by —R 3 C═CR 3 —, —C—C—, Si(R 3 ) 2 , Si(R 3 ) 2 , Ge(R 3 ) 2 , Sn(R 3 ) 2 , C═O, C═S, C═Se, C═NR 3 , NR 3 , P(═O)(R 3 ), —C(═O)O—, —C(═O)NR 3 —, —O—, —S—, SO or SO 2  and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I, CN or NO 2 , or an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R 3  radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and may be substituted by one or more R 3  radicals, or a combination of these systems; at the same time, two or more R 2  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system; 
 R 3  is the same or different at each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, in which hydrogen atoms may also be replaced by F; at the same time, two or more R 3  substituents together may also form a mono- or polycyclic, aliphatic, heteroaliphatic, aromatic or heteroaromatic ring system and n represents an integer in the range from 1 to 20. 
 
     
     
         32 . The compound according to  claim 24 , wherein the difference between the index s in formula (LAr-1) and the index t in formula (LAr-2) is not more than 2. 
     
     
         33 . An oligomer, polymer or dendrimer containing one or more compounds according to  claim 20 , wherein, rather than a hydrogen atom or a substituent, there are one or more bonds of the compounds to the polymer, oligomer or dendrimer. 
     
     
         34 . A composition comprising at least one compound according to  claim 20  and at least one further compound selected from the group consisting of fluorescent emitters, phosphorescent emitters, host materials, matrix materials, electron transport materials, electron injection materials, hole conductor materials, hole injection materials, electron blocker materials and hole blocker materials. 
     
     
         35 . A formulation comprising at least one compound according to  claim 20  and at least one solvent. 
     
     
         36 . A TADF material, host material, electron transport material or hole conductor material which comprises the compound according to  claim 20 . 
     
     
         37 . A process for preparing a compound according to  claim 20  which comprises joining a compound comprising at least one donor group to an acceptor group in a coupling reaction. 
     
     
         38 . An electronic device comprising at least one compound according to  claim 20 , wherein the electronic device is selected from the group consisting of organic integrated circuits, organic field-effect transistors, organic thin-film transistors, organic solar cells, organic optical detectors, organic photoreceptors, organic field-quench devices, organic electroluminescent devices. 
     
     
         39 . The electronic device as claimed in  claim 38 , wherein the device is an organic electroluminescent device selected from the group of the organic light-emitting transistors, organic light-emitting diodes, organic light-emitting electrochemical cells and organic laser diodes. 
     
     
         40 . The compound as claimed in  claim 20 , wherein the compound is selected from the group consisting of Formula 3, Formula 4, Formula 7, Formula 8, Formula 28, Formula 29, Formula 32, Formula 43, Formula 44, Formula 45, Formula 46, Formula 49. Formula 50 and Formula 51, 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         41 . The compound as claimed in  claim 40 , wherein the compound is selected from the group consisting of Formula 49. Formula 50 and Formula 51.