| 主权项 |
1. A polymer comprising the repeat unit of formula 1′ or 2′wherein, in the structure 1′ and 2′, m is an integer greater than or equal to one; n is 1 or 2; R1, R2, R3, R4, R5, R6, R7, and R8 may be, independently, hydrogen, substituted or unsubstituted C4 or greater alkyl, substituted or unsubstituted C4 or greater alkenyl, substituted or unsubstituted C4 or greater alkynyl, or C5 or greater cycloalkyl; a, b, c, and d are independently, integers greater than or equal to 3; e and f are integers greater than or equal to zero; X and Y are, independently a covalent bond, an optionally substituted aryl group, an optionally substituted heteroaryl, an optionally substituted fused aryl or fused heteroaryl group, an alkyne or an alkene; and A and B may be, independently, either S or O, with the provisos that:
i. at least one of R1 or R2; one of R3 or R4; one of R5 or R6; and one of R7 or R8 is a substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, or cycloalkyl; ii. if any of R1, R2, R3, or R4 is hydrogen, then none of R5, R6, R7, or R8 are hydrogen; iii. if any of R5, R6, R7, or R8 is hydrogen, then none of R1, R2, R3, or R4 are hydrogen; iv. e and f cannot both be 0; v. if either e or f is 0, then c and d, independently, are integers greater than or equal to 5; and vi. the polymer having a molecular weight, wherein the molecular weight of the polymer is greater than 10,000. |
