Patent ID: 8034365

Claim:
A polymer that comprises a recurring unit of the formula (I): wherein: X 1 and X 2 in formula (I) are each independently selected from the group consisting of Br and I; y 1 and y 2 in formula (I) are each independently zero or an integer in the range of 1 to 4; A 1 in formula (I) is selected from the group consisting of R 3 in formula (I) is selected from the group consisting of C 1 -C 30 alkyl, C 1 -C 30 heteroalkyl, C 5 -C 30 aryl, C 6 -C 30 alkylaryl, and C 2 -C 30 heteroaryl; R 4 in formula (I) selected from the group consisting of H, C 1 -C 30 alkyl, and C 1 -C 30 heteroalkyl; R 1 in formula (I) is Z in formula (I) is O or S; R 5 and R 6 in formula (I) are each independently selected from the group consisting of —CH═CH—, —CHJ 1 -CHJ 2 -, and —(CH 2 ) a —; a in formula (I) is zero or an integer in the range of 1 to 8; J 1 and J 2 in formula (I) are each independently selected from the group consisting of H, Br, and I; Q in formula (I) is a group comprising about 20 or more carbon atoms; R x in formula (I) is selected from optionally substituted branched or unbranched C 1 -C 30 alkyl and optionally substituted C 6 -C 30 aryl; and R y in formula (I) is selected from hydrogen, optionally substituted branched, or unbranched C 1 -C 30 alkyl and optionally substituted C 6 -C 30 aryl.