Patent ID: 7211643

Claim:
A copolymer consisting essentially of at least one first monomeric unit and at least one second monomeric unit, wherein the at least one first monomeric unit has a Formulae I and I(a) and the at least one second monomeric unit is selected from aromatic groups having Formula V where: in each of Formulae I, I(a) and V: R is a substituent on a carbon atom which can be the same or different at each occurrence and is selected from hydrogen, alkyl, aryl, heteroalkyl, heteroaryl, F, —CN, —OR 1 , —CO 2 R 1 , —C Ψ H θ F λ , —OC Ψ H θ F λ , —SR 1 , —N(R 1 ) 2 , —P(R 1 ) 2 , —SOR 1 , —SO 2 R 1 , —NO 2 , and beta-dicarbonyls having Formula XII or wherein R 2 is selected from hydrogen, alkyl, aryl, heteroalkyl, and heteroaryl; δ is 0 or an integer from 1 to 12 and adjacent R groups together can form a single 5- or 6-membered cycloalkyl, aryl, or heteroaryl ring, such that: R 1 is a substituent on a heteroatom which can be the same or different at each occurrence and is selected from alkyl, aryl, heteroalkyl and heteroaryl; and ψ is an integer between 1 and 20, and θ and λ are integers satisfying Equation A1 below: θ+λ=2Ψ+1; (Equation A1); in Formula V: E can be the same or different at each occurrence and is a single bond or a linking group selected from arylene and heteroarylene; Q 1 is a carbonyl group, O, S, SO 2 , or NR 1 where: R 1 is a substituent on a heteroatom which can be the same or different at each occurrence and is selected from alkyl, aryl, heteroalkyl and heteroaryl; W is H, alkyl or heteroalkyl; or both of W together can represent one single bond.