Polymers with amine-group-containing repeating units

A polymer having at least one repeat unit of the following formula (I):

• where
• X O, S, NR or CR2;
• Ar1, Ar2, Ar3 and Ar4 are the same or different at each instance and are independently a mono- or polycyclic, aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted by one or more R radicals;
• a and b are the same or different at each instance and are independently 0 or 1;
• where (a+b)=1 or 2;
• c and d are the same or different at each instance and are independently 0 or 1;
• e and f are the same or different at each instance and are independently 0, 1, 2 or 3;
• R is the same or different at each instance and is independently H, D, F, Cl, Br, I, N(R1)2, CN, NO2, Si(R1)3, B(OR1)2, C(═O)R1, P(═O)(R1)2, S(═O)R1, S(═O)2R1, OSO2R1, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 carbon atoms, an alkenyl or alkynyl group having 2 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 R1 radicals, where one or more nonadjacent CH2 groups may be replaced by R1C═CR1, C≡C, Si(R1)2, C═O, C═S, C═NR1, P(═O)R1, SO, SO2, NR1, O, S or CONR1 and where one or more hydrogen atoms may be replaced by D, F, Cl, Br, I or CN, or a mono- or polycyclic, aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and may be substituted in each case by one or more R1 radicals, or an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R1 radicals, or an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and may be substituted by one or more R1 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 R1 radicals;
• or a crosslinkable group Q, where two or more R radicals together may also form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system;
• R1 is the same or different at each instance and is independently H, D, F or an aliphatic hydrocarbyl radical having 1 to 20 carbon atoms, an aromatic or a heteroaromatic hydrocarbyl radical having 5 to 20 carbon atoms, in which one or more hydrogen atoms may also be replaced by F;
• where two or more R1 substituents together may also form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system;
• and the dotted lines represent bonds to adjacent repeat units in the polymer.