Patent ID: 7183366

Claim:
A copolymer comprising at least one first monomeric unit and at least one second monomeric unit, wherein the at least one first monomeric unit has Formula I or Ia and the at least one second monomeric unit is selected from fused ring aromatic groups having Formulae IX trough Formula XI, where: in each of Formulae I and IX through XI: R is a substituent on a carbon atom which can be the same or different at each occurence 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 and as further described below under “Formula XII”; or adjacent R groups together can form a 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 IX: E can be the same or different at each occurrence and is a single bond or a linking group selected from arylene and heteroarylene; and a first E is in the 2, 3, or 4 position; on a second E is in the 7, 8, or 9 position; and in Formula XII: R 2 is selected from hydrogen, alkyl, aryl, heteroalkyl and heteroaryl; δ is 0 or an integer from 1 to 12.