| 主权项 |
1. A polymer comprising 0.01 to 100 mol % of one or more structural units of the formula (7c) or (7d),where the symbols and indices used have the following meanings:
R1 is on each occurrence, identically or differently, H, F, Cl, Br, I, CN, NO2, Si(R2)3, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which is optionally substituted by one or more radicals R2, where one or more non-adjacent CH2 groups is optionally replaced by —R2C═CR2—, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, C═NR2, —O—, —S— or —CONR2— and where one or more H atoms is optionally replaced by F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms, which is optionally substituted by one or more radicals R2, or a combination of these systems; two or more substituents R1 here optionally also form a mono- or polycyclic, aliphatic, aromatic or heteroaromatic ring system with one another; R2 is on each occurrence, identically or differently, H, an aliphatic hydrocarbon radical having 1 to 20 C atoms or an aromatic hydrocarbon radical having 6 to 20 C atoms; X1 is on each occurrence, identically or differently, selected from B(R1), C(R1)2, Si(R1)2, C═O, C═NR1, C═C(R1)2, O, S, S═O, SO2, N(R1), P(R1), P(═O)R1, P(═S)R1 or a combination of two, three or four of these groups; X2 is on each occurrence, identically or differently, selected from B(R1), C(R1)2, Si(R1)2, C═O, C═NR1, C═C(R1)2, O, S, S═O, SO2, N(R1), P(R1), P(═O)R1, P(═S)R1 or a combination of two, three or four of these groups; andwherein the dashed lines denote the links in the polymer and the polymer has 10 to 10,000 recurring units. |
