Patent ID: 7348395

Claim:
An oligomer comprising the formula: HO—Ar 3 —R—Ar 2 O—Ar 1 —O—Ar 3 —R—Ar 2 n OH ; wherein Ar 1 is a divalent aromatic radical selected from the group consisting of substituted or unsubstituted phenyl, substituted or unsubstituted o-phenyl, substituted or unsubstituted m-phenyl, and substituted or unsubstituted p-phenyl; wherein Ar 2 and Ar 3 are independently selected divalent aromatic radicals selected from the group consisting of a substituted or unsubstituted aromatic ring, substituted or unsubstituted fused aromatic rings, and a substituted or unsubstituted aromatic ring assembly without intervening groups; wherein R is a substituted or unsubstituted divalent organic or sulfone group; and wherein n is a positive integer.