Patent ID: 7723455

Claim:
A polymer, characterized in that it comprises at least 1 mol % of units of the formula (I), where the symbols and indices used have the following meanings: X is identical or different on each occurrence and is in each case C(R3)(R4) or N(R3); Z is identical or different on each occurrence and is in each case C(R5) or N; R1, R2, R3, R4 are identical or different on each occurrence and are in each case fluorine, chlorine, bromine, iodine, CN, N(R6) 2 , Si(R6) 3 or B(R6) 2 , a straight-chain, branched or cyclic alkyl or alkoxy chain having from 1 to 22 carbon atoms in which one or more nonadjacent carbon atoms may also be replaced by NR6, O, S, O—CO—O, CONR6, Si(R6) 2 , where one or more H atoms may also be replaced by fluorine, an aryl, heteroaryl or aryloxy group having from 5 to 40 carbon atoms in which one or more carbon atoms may also be replaced by O, S or N and which may also be substituted by one or more nonaromatic radicals R1, with two or more of the radicals R1 to R4 also being able to be joined to form a ring system; with the proviso that two substituents on one carbon atom are not at the same time an alkoxy or aryloxy side chain and that all substituents R1 to R4 are not at the same time H or not at the same time a methyl group; R5 is identical or different on each occurrence and is in each case H, F, CN, N(R6) 2 or B(R6) 2 , a straight-chain, branched or cyclic alkyl or alkoxy chain having from 1 to 22 carbon atoms in which one or more nonadjacent carbon atoms may also be replaced by O, S, CO—O, O—CO—O, CONR6, Si(R6) 2 , where one or more H atoms may also be replaced by fluorine, an aryl, heteroaryl or aryloxy group having from 5 to 40 carbon atoms in which one or more carbon atoms may also be replaced by O, S or N and which may also be substituted by one or more nonaromatic radicals R5; with a plurality of radicals R5 or R5 together with R1 to R4 also being able to form a ring system; R6 is identical or different on each occurrence and is in each case H, a straight-chain, branched or cyclic alkyl chain having from 1 to 22 carbon atoms in which one or more nonadjacent carbon atoms may also be replaced by O, S, CO—O, O—CO—O, where one or more H atoms may also be replaced by fluorine, an aryl group having from 5 to 40 carbon atoms in which one or more carbon atoms may also be replaced by O, S or N and which may also be substituted by one or more nonaromatic radicals R6; a is identical or different on each occurrence and is in each case 0 or 1; b is identical or different on each occurrence and is in each case 1 or 2; with the proviso that poly(arylene-vinylene) compounds in which one arylene unit is a 9,10-dialkyl-9,10-dihydrophenanthrene are excluded from the invention; and the bond shown as a broken line indicates the linkage in the polymer.