Compositions comprising at least one polymer and at least one metal complex and to electroluminescent devices containing said compositions

A composition comprising at least one polymer and at least one metal complex, wherein the polymer comprises at least one structural unit of formula (I):

• wherein
• Ar1, Ar2 and Ar3
• are the same or different in each instance and are a mono- or polycyclic, aromatic or heteroaromatic ring system optionally substituted by one or more R radicals;
• R is the same or different in each instance and is 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 or 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 is optionally substituted by one or more R1 radicals, wherein one or more nonadjacent CH2 groups are optionally 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 wherein one or more hydrogen atoms are optionally replaced by D, F, Cl, Br, I, or CN, an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and is optionally substituted in each case by one or more R1 radicals, an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and is optionally substituted by one or more R1 radicals, an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and is optionally 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 is optionally substituted by one or more R1 radicals;
• an wherein two or more R radicals together optionally define a mono- or polycyclic, aliphatic, aromatic and/or benzofused ring system;
• R1 is the same or different in each instance and is H, D, F or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, wherein one or more hydrogen atoms are optionally replaced by F;
• and wherein two or more R1 substituents together optionally define a mono- or polycyclic, aliphatic or aromatic ring system;
• and
• the dotted lines denote bonds to adjacent structural units in the polymer;
• the metal complex comprises an atom selected from the group consisting of silicon, germanium, tin, lead, arsenic, antimony, and bismuth and a ligand of structure (L-I):
• wherein
• R11 and R12
• may independently be oxygen, sulfur, selenium, NH, or NR14, wherein R14 is selected from the group comprising alkyl or aryl and may be bonded to R13;
• and
• R13 is a straight-chain alkyl, alkoxy, or thioalkoxy group having 1 to 40 carbon atoms or 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 are optionally substituted by one or more R1 radicals, wherein one or more nonadjacent CH2 groups are optionally 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 wherein one or more hydrogen atoms are optionally replaced by D, F, Cl, Br, I, or CN, an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and are optionally substituted in each case by one or more R1 radicals, an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and is optionally substituted by one or more R1 radicals, an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and is optionally 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 is optionally substituted by one or more R1 radicals;
• and wherein the R13 radical optionally defines a ring system with one or both of the R11 and R12 radicals.